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Finding the Fourth Proportional to 15,452.71, 21,324.72 and 8,379.12

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Solution

The fourth proportional to 15,452.71, 21,324.72 and 8,379.12 is: 11,563.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,452.71 : 21,324.72 = 8,379.12 : x
  2. Step 2: Convert to fraction form
    15,452.71/21,324.72 = 8,379.12/x
  3. Step 3: Cross multiply
    15,452.71x = 21,324.72 × 8,379.12
  4. Step 4: Simplify right side
    15,452.71x = 178,682,387.85
  5. Step 5: Solve for x
    x = 178,682,387.85/15,452.71
  6. Step 6: Final answer
    x = 11,563.17

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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.