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Finding the Fourth Proportional to 13,791, 20,690.58 and 7,951.80

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Solution

The fourth proportional to 13,791, 20,690.58 and 7,951.80 is: 11,930.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791 : 20,690.58 = 7,951.80 : x
  2. Step 2: Convert to fraction form
    13,791/20,690.58 = 7,951.80/x
  3. Step 3: Cross multiply
    13,791x = 20,690.58 × 7,951.80
  4. Step 4: Simplify right side
    13,791x = 164,527,354.04
  5. Step 5: Solve for x
    x = 164,527,354.04/13,791
  6. Step 6: Final answer
    x = 11,930.05

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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.