Home / 20,862.90-28,781.14-18,475.30

Finding the Fourth Proportional to 20,862.90, 28,781.14 and 18,475.30

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Solution

The fourth proportional to 20,862.90, 28,781.14 and 18,475.30 is: 25,487.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.90 : 28,781.14 = 18,475.30 : x
  2. Step 2: Convert to fraction form
    20,862.90/28,781.14 = 18,475.30/x
  3. Step 3: Cross multiply
    20,862.90x = 28,781.14 × 18,475.30
  4. Step 4: Simplify right side
    20,862.90x = 531,740,195.84
  5. Step 5: Solve for x
    x = 531,740,195.84/20,862.90
  6. Step 6: Final answer
    x = 25,487.36

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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.