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Finding the Fourth Proportional to 8,612.70, 11,882.61 and 5,470.71

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Solution

The fourth proportional to 8,612.70, 11,882.61 and 5,470.71 is: 7,547.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.70 : 11,882.61 = 5,470.71 : x
  2. Step 2: Convert to fraction form
    8,612.70/11,882.61 = 5,470.71/x
  3. Step 3: Cross multiply
    8,612.70x = 11,882.61 × 5,470.71
  4. Step 4: Simplify right side
    8,612.70x = 65,006,313.35
  5. Step 5: Solve for x
    x = 65,006,313.35/8,612.70
  6. Step 6: Final answer
    x = 7,547.73

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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.