Home / 20,854.45-31,286.30-11,489.65

Finding the Fourth Proportional to 20,854.45, 31,286.30 and 11,489.65

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Solution

The fourth proportional to 20,854.45, 31,286.30 and 11,489.65 is: 17,237.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.45 : 31,286.30 = 11,489.65 : x
  2. Step 2: Convert to fraction form
    20,854.45/31,286.30 = 11,489.65/x
  3. Step 3: Cross multiply
    20,854.45x = 31,286.30 × 11,489.65
  4. Step 4: Simplify right side
    20,854.45x = 359,468,649.28
  5. Step 5: Solve for x
    x = 359,468,649.28/20,854.45
  6. Step 6: Final answer
    x = 17,237.02

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1.5x scale

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.