Home / 6,639.92-9,162.24-3,987.80

Finding the Fourth Proportional to 6,639.92, 9,162.24 and 3,987.80

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Solution

The fourth proportional to 6,639.92, 9,162.24 and 3,987.80 is: 5,502.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.92 : 9,162.24 = 3,987.80 : x
  2. Step 2: Convert to fraction form
    6,639.92/9,162.24 = 3,987.80/x
  3. Step 3: Cross multiply
    6,639.92x = 9,162.24 × 3,987.80
  4. Step 4: Simplify right side
    6,639.92x = 36,537,180.67
  5. Step 5: Solve for x
    x = 36,537,180.67/6,639.92
  6. Step 6: Final answer
    x = 5,502.65

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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.