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Finding the Fourth Proportional to 15,039.75, 20,754.55 and 8,325.38

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Solution

The fourth proportional to 15,039.75, 20,754.55 and 8,325.38 is: 11,488.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.75 : 20,754.55 = 8,325.38 : x
  2. Step 2: Convert to fraction form
    15,039.75/20,754.55 = 8,325.38/x
  3. Step 3: Cross multiply
    15,039.75x = 20,754.55 × 8,325.38
  4. Step 4: Simplify right side
    15,039.75x = 172,789,515.48
  5. Step 5: Solve for x
    x = 172,789,515.48/15,039.75
  6. Step 6: Final answer
    x = 11,488.86

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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.