Home / 3,129.80-4,695.92-1,668.16

Finding the Fourth Proportional to 3,129.80, 4,695.92 and 1,668.16

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Solution

The fourth proportional to 3,129.80, 4,695.92 and 1,668.16 is: 2,502.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.80 : 4,695.92 = 1,668.16 : x
  2. Step 2: Convert to fraction form
    3,129.80/4,695.92 = 1,668.16/x
  3. Step 3: Cross multiply
    3,129.80x = 4,695.92 × 1,668.16
  4. Step 4: Simplify right side
    3,129.80x = 7,833,545.91
  5. Step 5: Solve for x
    x = 7,833,545.91/3,129.80
  6. Step 6: Final answer
    x = 2,502.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.