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Finding the Fourth Proportional to 6,319.80, 8,721.42 and 3,487.30

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Solution

The fourth proportional to 6,319.80, 8,721.42 and 3,487.30 is: 4,812.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,319.80 : 8,721.42 = 3,487.30 : x
  2. Step 2: Convert to fraction form
    6,319.80/8,721.42 = 3,487.30/x
  3. Step 3: Cross multiply
    6,319.80x = 8,721.42 × 3,487.30
  4. Step 4: Simplify right side
    6,319.80x = 30,414,207.97
  5. Step 5: Solve for x
    x = 30,414,207.97/6,319.80
  6. Step 6: Final answer
    x = 4,812.53

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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.