Home / 20,517.57-28,314.45-11,565.06

Finding the Fourth Proportional to 20,517.57, 28,314.45 and 11,565.06

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Solution

The fourth proportional to 20,517.57, 28,314.45 and 11,565.06 is: 15,959.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.57 : 28,314.45 = 11,565.06 : x
  2. Step 2: Convert to fraction form
    20,517.57/28,314.45 = 11,565.06/x
  3. Step 3: Cross multiply
    20,517.57x = 28,314.45 × 11,565.06
  4. Step 4: Simplify right side
    20,517.57x = 327,458,313.12
  5. Step 5: Solve for x
    x = 327,458,313.12/20,517.57
  6. Step 6: Final answer
    x = 15,959.90

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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.