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Finding the Fourth Proportional to 8,617.84, 12,915.24 and 5,326.96

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Solution

The fourth proportional to 8,617.84, 12,915.24 and 5,326.96 is: 7,983.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.84 : 12,915.24 = 5,326.96 : x
  2. Step 2: Convert to fraction form
    8,617.84/12,915.24 = 5,326.96/x
  3. Step 3: Cross multiply
    8,617.84x = 12,915.24 × 5,326.96
  4. Step 4: Simplify right side
    8,617.84x = 68,798,966.87
  5. Step 5: Solve for x
    x = 68,798,966.87/8,617.84
  6. Step 6: Final answer
    x = 7,983.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.