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Finding the Fourth Proportional to 8,405.96, 12,616.72 and 4,248.90

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Solution

The fourth proportional to 8,405.96, 12,616.72 and 4,248.90 is: 6,377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.96 : 12,616.72 = 4,248.90 : x
  2. Step 2: Convert to fraction form
    8,405.96/12,616.72 = 4,248.90/x
  3. Step 3: Cross multiply
    8,405.96x = 12,616.72 × 4,248.90
  4. Step 4: Simplify right side
    8,405.96x = 53,607,181.61
  5. Step 5: Solve for x
    x = 53,607,181.61/8,405.96
  6. Step 6: Final answer
    x = 6,377.28

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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.