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Finding the Fourth Proportional to 8,791.70, 12,132.69 and 5,255.30

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Solution

The fourth proportional to 8,791.70, 12,132.69 and 5,255.30 is: 7,252.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.70 : 12,132.69 = 5,255.30 : x
  2. Step 2: Convert to fraction form
    8,791.70/12,132.69 = 5,255.30/x
  3. Step 3: Cross multiply
    8,791.70x = 12,132.69 × 5,255.30
  4. Step 4: Simplify right side
    8,791.70x = 63,760,925.76
  5. Step 5: Solve for x
    x = 63,760,925.76/8,791.70
  6. Step 6: Final answer
    x = 7,252.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.