Home / 30,687.26-42,325.74-18,740.77

Finding the Fourth Proportional to 30,687.26, 42,325.74 and 18,740.77

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Solution

The fourth proportional to 30,687.26, 42,325.74 and 18,740.77 is: 25,848.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,687.26 : 42,325.74 = 18,740.77 : x
  2. Step 2: Convert to fraction form
    30,687.26/42,325.74 = 18,740.77/x
  3. Step 3: Cross multiply
    30,687.26x = 42,325.74 × 18,740.77
  4. Step 4: Simplify right side
    30,687.26x = 793,216,852.61
  5. Step 5: Solve for x
    x = 793,216,852.61/30,687.26
  6. Step 6: Final answer
    x = 25,848.41

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Double scale
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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.