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Finding the Fourth Proportional to 6,349.08, 8,762.49 and 3,990.90

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Solution

The fourth proportional to 6,349.08, 8,762.49 and 3,990.90 is: 5,507.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,349.08 : 8,762.49 = 3,990.90 : x
  2. Step 2: Convert to fraction form
    6,349.08/8,762.49 = 3,990.90/x
  3. Step 3: Cross multiply
    6,349.08x = 8,762.49 × 3,990.90
  4. Step 4: Simplify right side
    6,349.08x = 34,970,221.34
  5. Step 5: Solve for x
    x = 34,970,221.34/6,349.08
  6. Step 6: Final answer
    x = 5,507.92

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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.