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Finding the Fourth Proportional to 15,107.28, 20,843.02 and 9,136.68

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Solution

The fourth proportional to 15,107.28, 20,843.02 and 9,136.68 is: 12,605.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,107.28 : 20,843.02 = 9,136.68 : x
  2. Step 2: Convert to fraction form
    15,107.28/20,843.02 = 9,136.68/x
  3. Step 3: Cross multiply
    15,107.28x = 20,843.02 × 9,136.68
  4. Step 4: Simplify right side
    15,107.28x = 190,436,003.97
  5. Step 5: Solve for x
    x = 190,436,003.97/15,107.28
  6. Step 6: Final answer
    x = 12,605.58

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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.