Home / 31,089.36-42,900.12-18,511.68

Finding the Fourth Proportional to 31,089.36, 42,900.12 and 18,511.68

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Solution

The fourth proportional to 31,089.36, 42,900.12 and 18,511.68 is: 25,544.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,089.36 : 42,900.12 = 18,511.68 : x
  2. Step 2: Convert to fraction form
    31,089.36/42,900.12 = 18,511.68/x
  3. Step 3: Cross multiply
    31,089.36x = 42,900.12 × 18,511.68
  4. Step 4: Simplify right side
    31,089.36x = 794,153,293.40
  5. Step 5: Solve for x
    x = 794,153,293.40/31,089.36
  6. Step 6: Final answer
    x = 25,544.21

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Find fourth proportional to 15,544.68, 21,450.06 and 9,255.84
Half scale
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Double scale
Find fourth proportional to 31,090.36, 42,901.50 and 18,512.68
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.