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Finding the Fourth Proportional to 6,387.43, 8,812.20 and 4,712.83

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Solution

The fourth proportional to 6,387.43, 8,812.20 and 4,712.83 is: 6,501.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.43 : 8,812.20 = 4,712.83 : x
  2. Step 2: Convert to fraction form
    6,387.43/8,812.20 = 4,712.83/x
  3. Step 3: Cross multiply
    6,387.43x = 8,812.20 × 4,712.83
  4. Step 4: Simplify right side
    6,387.43x = 41,530,356.47
  5. Step 5: Solve for x
    x = 41,530,356.47/6,387.43
  6. Step 6: Final answer
    x = 6,501.89

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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.