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Finding the Fourth Proportional to 8,799.30, 12,143.10 and 4,820.78

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Solution

The fourth proportional to 8,799.30, 12,143.10 and 4,820.78 is: 6,652.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,799.30 : 12,143.10 = 4,820.78 : x
  2. Step 2: Convert to fraction form
    8,799.30/12,143.10 = 4,820.78/x
  3. Step 3: Cross multiply
    8,799.30x = 12,143.10 × 4,820.78
  4. Step 4: Simplify right side
    8,799.30x = 58,539,213.62
  5. Step 5: Solve for x
    x = 58,539,213.62/8,799.30
  6. Step 6: Final answer
    x = 6,652.71

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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.