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Finding the Fourth Proportional to 8,454.84, 12,656.28 and 7,618.31

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Solution

The fourth proportional to 8,454.84, 12,656.28 and 7,618.31 is: 11,404.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,454.84 : 12,656.28 = 7,618.31 : x
  2. Step 2: Convert to fraction form
    8,454.84/12,656.28 = 7,618.31/x
  3. Step 3: Cross multiply
    8,454.84x = 12,656.28 × 7,618.31
  4. Step 4: Simplify right side
    8,454.84x = 96,419,464.49
  5. Step 5: Solve for x
    x = 96,419,464.49/8,454.84
  6. Step 6: Final answer
    x = 11,404.06

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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.