Home / 19,640.68-27,109.92-11,986.72

Finding the Fourth Proportional to 19,640.68, 27,109.92 and 11,986.72

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Solution

The fourth proportional to 19,640.68, 27,109.92 and 11,986.72 is: 16,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.68 : 27,109.92 = 11,986.72 : x
  2. Step 2: Convert to fraction form
    19,640.68/27,109.92 = 11,986.72/x
  3. Step 3: Cross multiply
    19,640.68x = 27,109.92 × 11,986.72
  4. Step 4: Simplify right side
    19,640.68x = 324,959,020.26
  5. Step 5: Solve for x
    x = 324,959,020.26/19,640.68
  6. Step 6: Final answer
    x = 16,545.20

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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.