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Finding the Fourth Proportional to 8,553.60, 12,787.20 and 8,467.20

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Solution

The fourth proportional to 8,553.60, 12,787.20 and 8,467.20 is: 12,658.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,553.60 : 12,787.20 = 8,467.20 : x
  2. Step 2: Convert to fraction form
    8,553.60/12,787.20 = 8,467.20/x
  3. Step 3: Cross multiply
    8,553.60x = 12,787.20 × 8,467.20
  4. Step 4: Simplify right side
    8,553.60x = 108,271,779.84
  5. Step 5: Solve for x
    x = 108,271,779.84/8,553.60
  6. Step 6: Final answer
    x = 12,658.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.