Home / 20,862.01-28,790-11,431.18

Finding the Fourth Proportional to 20,862.01, 28,790 and 11,431.18

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Solution

The fourth proportional to 20,862.01, 28,790 and 11,431.18 is: 15,775.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.01 : 28,790 = 11,431.18 : x
  2. Step 2: Convert to fraction form
    20,862.01/28,790 = 11,431.18/x
  3. Step 3: Cross multiply
    20,862.01x = 28,790 × 11,431.18
  4. Step 4: Simplify right side
    20,862.01x = 329,103,672.20
  5. Step 5: Solve for x
    x = 329,103,672.20/20,862.01
  6. Step 6: Final answer
    x = 15,775.26

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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.