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Finding the Fourth Proportional to 8,641.11, 11,922.61 and 5,282.70

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Solution

The fourth proportional to 8,641.11, 11,922.61 and 5,282.70 is: 7,288.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.11 : 11,922.61 = 5,282.70 : x
  2. Step 2: Convert to fraction form
    8,641.11/11,922.61 = 5,282.70/x
  3. Step 3: Cross multiply
    8,641.11x = 11,922.61 × 5,282.70
  4. Step 4: Simplify right side
    8,641.11x = 62,983,590.90
  5. Step 5: Solve for x
    x = 62,983,590.90/8,641.11
  6. Step 6: Final answer
    x = 7,288.83

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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.