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Finding the Fourth Proportional to 15,067.28, 20,792.80 and 8,443.28

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Solution

The fourth proportional to 15,067.28, 20,792.80 and 8,443.28 is: 11,651.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,067.28 : 20,792.80 = 8,443.28 : x
  2. Step 2: Convert to fraction form
    15,067.28/20,792.80 = 8,443.28/x
  3. Step 3: Cross multiply
    15,067.28x = 20,792.80 × 8,443.28
  4. Step 4: Simplify right side
    15,067.28x = 175,559,432.38
  5. Step 5: Solve for x
    x = 175,559,432.38/15,067.28
  6. Step 6: Final answer
    x = 11,651.70

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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.