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Finding the Fourth Proportional to 8,811.11, 12,159.89 and 5,821.70

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Solution

The fourth proportional to 8,811.11, 12,159.89 and 5,821.70 is: 8,034.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.11 : 12,159.89 = 5,821.70 : x
  2. Step 2: Convert to fraction form
    8,811.11/12,159.89 = 5,821.70/x
  3. Step 3: Cross multiply
    8,811.11x = 12,159.89 × 5,821.70
  4. Step 4: Simplify right side
    8,811.11x = 70,791,141.71
  5. Step 5: Solve for x
    x = 70,791,141.71/8,811.11
  6. Step 6: Final answer
    x = 8,034.31

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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.