Home / 20,689.13-28,551.60-11,258.30

Finding the Fourth Proportional to 20,689.13, 28,551.60 and 11,258.30

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Solution

The fourth proportional to 20,689.13, 28,551.60 and 11,258.30 is: 15,536.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.13 : 28,551.60 = 11,258.30 : x
  2. Step 2: Convert to fraction form
    20,689.13/28,551.60 = 11,258.30/x
  3. Step 3: Cross multiply
    20,689.13x = 28,551.60 × 11,258.30
  4. Step 4: Simplify right side
    20,689.13x = 321,442,335.52
  5. Step 5: Solve for x
    x = 321,442,335.52/20,689.13
  6. Step 6: Final answer
    x = 15,536.78

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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.