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Finding the Fourth Proportional to 8,604.78, 12,887.90 and 7,479.78

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Solution

The fourth proportional to 8,604.78, 12,887.90 and 7,479.78 is: 11,202.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.78 : 12,887.90 = 7,479.78 : x
  2. Step 2: Convert to fraction form
    8,604.78/12,887.90 = 7,479.78/x
  3. Step 3: Cross multiply
    8,604.78x = 12,887.90 × 7,479.78
  4. Step 4: Simplify right side
    8,604.78x = 96,398,656.66
  5. Step 5: Solve for x
    x = 96,398,656.66/8,604.78
  6. Step 6: Final answer
    x = 11,202.92

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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.