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Finding the Fourth Proportional to 20,874, 28,806.12 and 11,442.92

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Solution

The fourth proportional to 20,874, 28,806.12 and 11,442.92 is: 15,791.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874 : 28,806.12 = 11,442.92 : x
  2. Step 2: Convert to fraction form
    20,874/28,806.12 = 11,442.92/x
  3. Step 3: Cross multiply
    20,874x = 28,806.12 × 11,442.92
  4. Step 4: Simplify right side
    20,874x = 329,626,126.67
  5. Step 5: Solve for x
    x = 329,626,126.67/20,874
  6. Step 6: Final answer
    x = 15,791.23

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Double scale
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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.