Home / 20,711.27-28,581.59-11,279.87

Finding the Fourth Proportional to 20,711.27, 28,581.59 and 11,279.87

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Solution

The fourth proportional to 20,711.27, 28,581.59 and 11,279.87 is: 15,566.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.27 : 28,581.59 = 11,279.87 : x
  2. Step 2: Convert to fraction form
    20,711.27/28,581.59 = 11,279.87/x
  3. Step 3: Cross multiply
    20,711.27x = 28,581.59 × 11,279.87
  4. Step 4: Simplify right side
    20,711.27x = 322,396,563.19
  5. Step 5: Solve for x
    x = 322,396,563.19/20,711.27
  6. Step 6: Final answer
    x = 15,566.24

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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.