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Finding the Fourth Proportional to 8,812.35, 12,153.97 and 7,747.85

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Solution

The fourth proportional to 8,812.35, 12,153.97 and 7,747.85 is: 10,685.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.35 : 12,153.97 = 7,747.85 : x
  2. Step 2: Convert to fraction form
    8,812.35/12,153.97 = 7,747.85/x
  3. Step 3: Cross multiply
    8,812.35x = 12,153.97 × 7,747.85
  4. Step 4: Simplify right side
    8,812.35x = 94,167,136.46
  5. Step 5: Solve for x
    x = 94,167,136.46/8,812.35
  6. Step 6: Final answer
    x = 10,685.81

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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.