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Finding the Fourth Proportional to 18,637.86, 27,951.10 and 5,311.94

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Solution

The fourth proportional to 18,637.86, 27,951.10 and 5,311.94 is: 7,966.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637.86 : 27,951.10 = 5,311.94 : x
  2. Step 2: Convert to fraction form
    18,637.86/27,951.10 = 5,311.94/x
  3. Step 3: Cross multiply
    18,637.86x = 27,951.10 × 5,311.94
  4. Step 4: Simplify right side
    18,637.86x = 148,474,566.13
  5. Step 5: Solve for x
    x = 148,474,566.13/18,637.86
  6. Step 6: Final answer
    x = 7,966.29

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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.