Home / 20,489.31-28,275.77-11,537.15

Finding the Fourth Proportional to 20,489.31, 28,275.77 and 11,537.15

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Solution

The fourth proportional to 20,489.31, 28,275.77 and 11,537.15 is: 15,921.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.31 : 28,275.77 = 11,537.15 : x
  2. Step 2: Convert to fraction form
    20,489.31/28,275.77 = 11,537.15/x
  3. Step 3: Cross multiply
    20,489.31x = 28,275.77 × 11,537.15
  4. Step 4: Simplify right side
    20,489.31x = 326,221,687.32
  5. Step 5: Solve for x
    x = 326,221,687.32/20,489.31
  6. Step 6: Final answer
    x = 15,921.56

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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.