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Finding the Fourth Proportional to 15,039.56, 20,754.42 and 8,325.20

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Solution

The fourth proportional to 15,039.56, 20,754.42 and 8,325.20 is: 11,488.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.56 : 20,754.42 = 8,325.20 : x
  2. Step 2: Convert to fraction form
    15,039.56/20,754.42 = 8,325.20/x
  3. Step 3: Cross multiply
    15,039.56x = 20,754.42 × 8,325.20
  4. Step 4: Simplify right side
    15,039.56x = 172,784,697.38
  5. Step 5: Solve for x
    x = 172,784,697.38/15,039.56
  6. Step 6: Final answer
    x = 11,488.68

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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.