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Finding the Fourth Proportional to 13,385.59, 18,472.09 and 7,335.97

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Solution

The fourth proportional to 13,385.59, 18,472.09 and 7,335.97 is: 10,123.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.59 : 18,472.09 = 7,335.97 : x
  2. Step 2: Convert to fraction form
    13,385.59/18,472.09 = 7,335.97/x
  3. Step 3: Cross multiply
    13,385.59x = 18,472.09 × 7,335.97
  4. Step 4: Simplify right side
    13,385.59x = 135,510,698.08
  5. Step 5: Solve for x
    x = 135,510,698.08/13,385.59
  6. Step 6: Final answer
    x = 10,123.63

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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.