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Finding the Fourth Proportional to 11,862.60, 17,793.90 and 5,281.80

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Solution

The fourth proportional to 11,862.60, 17,793.90 and 5,281.80 is: 7,922.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,862.60 : 17,793.90 = 5,281.80 : x
  2. Step 2: Convert to fraction form
    11,862.60/17,793.90 = 5,281.80/x
  3. Step 3: Cross multiply
    11,862.60x = 17,793.90 × 5,281.80
  4. Step 4: Simplify right side
    11,862.60x = 93,983,821.02
  5. Step 5: Solve for x
    x = 93,983,821.02/11,862.60
  6. Step 6: Final answer
    x = 7,922.70

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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.