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Finding the Fourth Proportional to 6,581, 9,081.78 and 3,928.88

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Solution

The fourth proportional to 6,581, 9,081.78 and 3,928.88 is: 5,421.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,581 : 9,081.78 = 3,928.88 : x
  2. Step 2: Convert to fraction form
    6,581/9,081.78 = 3,928.88/x
  3. Step 3: Cross multiply
    6,581x = 9,081.78 × 3,928.88
  4. Step 4: Simplify right side
    6,581x = 35,681,223.81
  5. Step 5: Solve for x
    x = 35,681,223.81/6,581
  6. Step 6: Final answer
    x = 5,421.85

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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.