Home / 6,660.29-9,191.85-4,978.79

Finding the Fourth Proportional to 6,660.29, 9,191.85 and 4,978.79

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Solution

The fourth proportional to 6,660.29, 9,191.85 and 4,978.79 is: 6,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660.29 : 9,191.85 = 4,978.79 : x
  2. Step 2: Convert to fraction form
    6,660.29/9,191.85 = 4,978.79/x
  3. Step 3: Cross multiply
    6,660.29x = 9,191.85 × 4,978.79
  4. Step 4: Simplify right side
    6,660.29x = 45,764,244.90
  5. Step 5: Solve for x
    x = 45,764,244.90/6,660.29
  6. Step 6: Final answer
    x = 6,871.21

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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.