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Finding the Fourth Proportional to 18,495.60, 27,719.10 and 16,405.80

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Solution

The fourth proportional to 18,495.60, 27,719.10 and 16,405.80 is: 24,587.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,495.60 : 27,719.10 = 16,405.80 : x
  2. Step 2: Convert to fraction form
    18,495.60/27,719.10 = 16,405.80/x
  3. Step 3: Cross multiply
    18,495.60x = 27,719.10 × 16,405.80
  4. Step 4: Simplify right side
    18,495.60x = 454,754,010.78
  5. Step 5: Solve for x
    x = 454,754,010.78/18,495.60
  6. Step 6: Final answer
    x = 24,587.15

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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.