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Finding the Fourth Proportional to 8,791.74, 12,132.15 and 4,812.10

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Solution

The fourth proportional to 8,791.74, 12,132.15 and 4,812.10 is: 6,640.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.74 : 12,132.15 = 4,812.10 : x
  2. Step 2: Convert to fraction form
    8,791.74/12,132.15 = 4,812.10/x
  3. Step 3: Cross multiply
    8,791.74x = 12,132.15 × 4,812.10
  4. Step 4: Simplify right side
    8,791.74x = 58,381,070.64
  5. Step 5: Solve for x
    x = 58,381,070.64/8,791.74
  6. Step 6: Final answer
    x = 6,640.45

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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.