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Finding the Fourth Proportional to 8,334.80, 12,502.20 and 3,142.70

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Solution

The fourth proportional to 8,334.80, 12,502.20 and 3,142.70 is: 4,714.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,334.80 : 12,502.20 = 3,142.70 : x
  2. Step 2: Convert to fraction form
    8,334.80/12,502.20 = 3,142.70/x
  3. Step 3: Cross multiply
    8,334.80x = 12,502.20 × 3,142.70
  4. Step 4: Simplify right side
    8,334.80x = 39,290,663.94
  5. Step 5: Solve for x
    x = 39,290,663.94/8,334.80
  6. Step 6: Final answer
    x = 4,714.05

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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.