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Finding the Fourth Proportional to 14,387.78, 21,584.73 and 8,150.78

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Solution

The fourth proportional to 14,387.78, 21,584.73 and 8,150.78 is: 12,227.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,387.78 : 21,584.73 = 8,150.78 : x
  2. Step 2: Convert to fraction form
    14,387.78/21,584.73 = 8,150.78/x
  3. Step 3: Cross multiply
    14,387.78x = 21,584.73 × 8,150.78
  4. Step 4: Simplify right side
    14,387.78x = 175,932,385.59
  5. Step 5: Solve for x
    x = 175,932,385.59/14,387.78
  6. Step 6: Final answer
    x = 12,227.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.