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Finding the Fourth Proportional to 15,034.16, 20,747.19 and 8,320.25

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Solution

The fourth proportional to 15,034.16, 20,747.19 and 8,320.25 is: 11,481.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,034.16 : 20,747.19 = 8,320.25 : x
  2. Step 2: Convert to fraction form
    15,034.16/20,747.19 = 8,320.25/x
  3. Step 3: Cross multiply
    15,034.16x = 20,747.19 × 8,320.25
  4. Step 4: Simplify right side
    15,034.16x = 172,621,874.97
  5. Step 5: Solve for x
    x = 172,621,874.97/15,034.16
  6. Step 6: Final answer
    x = 11,481.97

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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.