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Finding the Fourth Proportional to 9,915.92, 13,700.04 and 8,439.44

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Solution

The fourth proportional to 9,915.92, 13,700.04 and 8,439.44 is: 11,660.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.92 : 13,700.04 = 8,439.44 : x
  2. Step 2: Convert to fraction form
    9,915.92/13,700.04 = 8,439.44/x
  3. Step 3: Cross multiply
    9,915.92x = 13,700.04 × 8,439.44
  4. Step 4: Simplify right side
    9,915.92x = 115,620,665.58
  5. Step 5: Solve for x
    x = 115,620,665.58/9,915.92
  6. Step 6: Final answer
    x = 11,660.10

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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.