Home / 20,486.43-28,273.97-11,535.68

Finding the Fourth Proportional to 20,486.43, 28,273.97 and 11,535.68

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Solution

The fourth proportional to 20,486.43, 28,273.97 and 11,535.68 is: 15,920.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.43 : 28,273.97 = 11,535.68 : x
  2. Step 2: Convert to fraction form
    20,486.43/28,273.97 = 11,535.68/x
  3. Step 3: Cross multiply
    20,486.43x = 28,273.97 × 11,535.68
  4. Step 4: Simplify right side
    20,486.43x = 326,159,470.25
  5. Step 5: Solve for x
    x = 326,159,470.25/20,486.43
  6. Step 6: Final answer
    x = 15,920.76

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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.