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Finding the Fourth Proportional to 15,398.20, 21,249.60 and 8,324.60

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Solution

The fourth proportional to 15,398.20, 21,249.60 and 8,324.60 is: 11,487.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.20 : 21,249.60 = 8,324.60 : x
  2. Step 2: Convert to fraction form
    15,398.20/21,249.60 = 8,324.60/x
  3. Step 3: Cross multiply
    15,398.20x = 21,249.60 × 8,324.60
  4. Step 4: Simplify right side
    15,398.20x = 176,894,420.16
  5. Step 5: Solve for x
    x = 176,894,420.16/15,398.20
  6. Step 6: Final answer
    x = 11,487.99

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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.