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Finding the Fourth Proportional to 15,221.62, 21,004.41 and 8,932.78

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Solution

The fourth proportional to 15,221.62, 21,004.41 and 8,932.78 is: 12,326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.62 : 21,004.41 = 8,932.78 : x
  2. Step 2: Convert to fraction form
    15,221.62/21,004.41 = 8,932.78/x
  3. Step 3: Cross multiply
    15,221.62x = 21,004.41 × 8,932.78
  4. Step 4: Simplify right side
    15,221.62x = 187,627,773.56
  5. Step 5: Solve for x
    x = 187,627,773.56/15,221.62
  6. Step 6: Final answer
    x = 12,326.40

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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.