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Finding the Fourth Proportional to 6,687.49, 9,219.12 and 4,691.86

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Solution

The fourth proportional to 6,687.49, 9,219.12 and 4,691.86 is: 6,468.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,687.49 : 9,219.12 = 4,691.86 : x
  2. Step 2: Convert to fraction form
    6,687.49/9,219.12 = 4,691.86/x
  3. Step 3: Cross multiply
    6,687.49x = 9,219.12 × 4,691.86
  4. Step 4: Simplify right side
    6,687.49x = 43,254,820.36
  5. Step 5: Solve for x
    x = 43,254,820.36/6,687.49
  6. Step 6: Final answer
    x = 6,468.02

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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.