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Finding the Fourth Proportional to 8,963.84, 12,381.72 and 7,717.52

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Solution

The fourth proportional to 8,963.84, 12,381.72 and 7,717.52 is: 10,660.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,963.84 : 12,381.72 = 7,717.52 : x
  2. Step 2: Convert to fraction form
    8,963.84/12,381.72 = 7,717.52/x
  3. Step 3: Cross multiply
    8,963.84x = 12,381.72 × 7,717.52
  4. Step 4: Simplify right side
    8,963.84x = 95,556,171.73
  5. Step 5: Solve for x
    x = 95,556,171.73/8,963.84
  6. Step 6: Final answer
    x = 10,660.18

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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.