Home / 31,118.21-42,942.66-16,970.75

Finding the Fourth Proportional to 31,118.21, 42,942.66 and 16,970.75

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Solution

The fourth proportional to 31,118.21, 42,942.66 and 16,970.75 is: 23,419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,118.21 : 42,942.66 = 16,970.75 : x
  2. Step 2: Convert to fraction form
    31,118.21/42,942.66 = 16,970.75/x
  3. Step 3: Cross multiply
    31,118.21x = 42,942.66 × 16,970.75
  4. Step 4: Simplify right side
    31,118.21x = 728,769,147.20
  5. Step 5: Solve for x
    x = 728,769,147.20/31,118.21
  6. Step 6: Final answer
    x = 23,419.38

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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.