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Finding the Fourth Proportional to 18,005.80, 27,008.70 and 13,397.80

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Solution

The fourth proportional to 18,005.80, 27,008.70 and 13,397.80 is: 20,096.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.80 : 27,008.70 = 13,397.80 : x
  2. Step 2: Convert to fraction form
    18,005.80/27,008.70 = 13,397.80/x
  3. Step 3: Cross multiply
    18,005.80x = 27,008.70 × 13,397.80
  4. Step 4: Simplify right side
    18,005.80x = 361,857,160.86
  5. Step 5: Solve for x
    x = 361,857,160.86/18,005.80
  6. Step 6: Final answer
    x = 20,096.70

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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.