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Finding the Fourth Proportional to 8,391.81, 11,581.61 and 5,249.01

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Solution

The fourth proportional to 8,391.81, 11,581.61 and 5,249.01 is: 7,244.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.81 : 11,581.61 = 5,249.01 : x
  2. Step 2: Convert to fraction form
    8,391.81/11,581.61 = 5,249.01/x
  3. Step 3: Cross multiply
    8,391.81x = 11,581.61 × 5,249.01
  4. Step 4: Simplify right side
    8,391.81x = 60,791,960.46
  5. Step 5: Solve for x
    x = 60,791,960.46/8,391.81
  6. Step 6: Final answer
    x = 7,244.20

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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.