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Finding the Fourth Proportional to 9,269.68, 12,789.15 and 5,680.90

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Solution

The fourth proportional to 9,269.68, 12,789.15 and 5,680.90 is: 7,837.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,269.68 : 12,789.15 = 5,680.90 : x
  2. Step 2: Convert to fraction form
    9,269.68/12,789.15 = 5,680.90/x
  3. Step 3: Cross multiply
    9,269.68x = 12,789.15 × 5,680.90
  4. Step 4: Simplify right side
    9,269.68x = 72,653,882.24
  5. Step 5: Solve for x
    x = 72,653,882.24/9,269.68
  6. Step 6: Final answer
    x = 7,837.80

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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.