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Finding the Fourth Proportional to 6,641.52, 9,162.54 and 4,122.78

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Solution

The fourth proportional to 6,641.52, 9,162.54 and 4,122.78 is: 5,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.52 : 9,162.54 = 4,122.78 : x
  2. Step 2: Convert to fraction form
    6,641.52/9,162.54 = 4,122.78/x
  3. Step 3: Cross multiply
    6,641.52x = 9,162.54 × 4,122.78
  4. Step 4: Simplify right side
    6,641.52x = 37,775,136.66
  5. Step 5: Solve for x
    x = 37,775,136.66/6,641.52
  6. Step 6: Final answer
    x = 5,687.72

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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.