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Finding the Fourth Proportional to 15,043.76, 20,753.85 and 9,072.10

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Solution

The fourth proportional to 15,043.76, 20,753.85 and 9,072.10 is: 12,515.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,043.76 : 20,753.85 = 9,072.10 : x
  2. Step 2: Convert to fraction form
    15,043.76/20,753.85 = 9,072.10/x
  3. Step 3: Cross multiply
    15,043.76x = 20,753.85 × 9,072.10
  4. Step 4: Simplify right side
    15,043.76x = 188,280,898.82
  5. Step 5: Solve for x
    x = 188,280,898.82/15,043.76
  6. Step 6: Final answer
    x = 12,515.55

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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.