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Finding the Fourth Proportional to 18,171.72, 27,122.76 and 15,662.16

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Solution

The fourth proportional to 18,171.72, 27,122.76 and 15,662.16 is: 23,377.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,171.72 : 27,122.76 = 15,662.16 : x
  2. Step 2: Convert to fraction form
    18,171.72/27,122.76 = 15,662.16/x
  3. Step 3: Cross multiply
    18,171.72x = 27,122.76 × 15,662.16
  4. Step 4: Simplify right side
    18,171.72x = 424,801,006.76
  5. Step 5: Solve for x
    x = 424,801,006.76/18,171.72
  6. Step 6: Final answer
    x = 23,377.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.