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Finding the Fourth Proportional to 18,116.60, 27,174.90 and 12,211.70

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Solution

The fourth proportional to 18,116.60, 27,174.90 and 12,211.70 is: 18,317.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,116.60 : 27,174.90 = 12,211.70 : x
  2. Step 2: Convert to fraction form
    18,116.60/27,174.90 = 12,211.70/x
  3. Step 3: Cross multiply
    18,116.60x = 27,174.90 × 12,211.70
  4. Step 4: Simplify right side
    18,116.60x = 331,851,726.33
  5. Step 5: Solve for x
    x = 331,851,726.33/18,116.60
  6. Step 6: Final answer
    x = 18,317.55

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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.