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Finding the Fourth Proportional to 18,957.71, 28,442.03 and 5,812.02

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Solution

The fourth proportional to 18,957.71, 28,442.03 and 5,812.02 is: 8,719.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.71 : 28,442.03 = 5,812.02 : x
  2. Step 2: Convert to fraction form
    18,957.71/28,442.03 = 5,812.02/x
  3. Step 3: Cross multiply
    18,957.71x = 28,442.03 × 5,812.02
  4. Step 4: Simplify right side
    18,957.71x = 165,305,647.20
  5. Step 5: Solve for x
    x = 165,305,647.20/18,957.71
  6. Step 6: Final answer
    x = 8,719.71

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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.