Home / 12,686.18-17,502.68-7,379.87

Finding the Fourth Proportional to 12,686.18, 17,502.68 and 7,379.87

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Solution

The fourth proportional to 12,686.18, 17,502.68 and 7,379.87 is: 10,181.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.18 : 17,502.68 = 7,379.87 : x
  2. Step 2: Convert to fraction form
    12,686.18/17,502.68 = 7,379.87/x
  3. Step 3: Cross multiply
    12,686.18x = 17,502.68 × 7,379.87
  4. Step 4: Simplify right side
    12,686.18x = 129,167,433.99
  5. Step 5: Solve for x
    x = 129,167,433.99/12,686.18
  6. Step 6: Final answer
    x = 10,181.75

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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.