Home / 13,659.10-18,849.38-7,691.36

Finding the Fourth Proportional to 13,659.10, 18,849.38 and 7,691.36

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Solution

The fourth proportional to 13,659.10, 18,849.38 and 7,691.36 is: 10,613.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.10 : 18,849.38 = 7,691.36 : x
  2. Step 2: Convert to fraction form
    13,659.10/18,849.38 = 7,691.36/x
  3. Step 3: Cross multiply
    13,659.10x = 18,849.38 × 7,691.36
  4. Step 4: Simplify right side
    13,659.10x = 144,977,234.65
  5. Step 5: Solve for x
    x = 144,977,234.65/13,659.10
  6. Step 6: Final answer
    x = 10,613.97

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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.