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Finding the Fourth Proportional to 8,791.20, 12,213.45 and 8,710.20

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Solution

The fourth proportional to 8,791.20, 12,213.45 and 8,710.20 is: 12,100.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.20 : 12,213.45 = 8,710.20 : x
  2. Step 2: Convert to fraction form
    8,791.20/12,213.45 = 8,710.20/x
  3. Step 3: Cross multiply
    8,791.20x = 12,213.45 × 8,710.20
  4. Step 4: Simplify right side
    8,791.20x = 106,381,592.19
  5. Step 5: Solve for x
    x = 106,381,592.19/8,791.20
  6. Step 6: Final answer
    x = 12,100.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.