Home / 31,278.96-43,179.48-20,081.52

Finding the Fourth Proportional to 31,278.96, 43,179.48 and 20,081.52

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Solution

The fourth proportional to 31,278.96, 43,179.48 and 20,081.52 is: 27,721.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,278.96 : 43,179.48 = 20,081.52 : x
  2. Step 2: Convert to fraction form
    31,278.96/43,179.48 = 20,081.52/x
  3. Step 3: Cross multiply
    31,278.96x = 43,179.48 × 20,081.52
  4. Step 4: Simplify right side
    31,278.96x = 867,109,591.21
  5. Step 5: Solve for x
    x = 867,109,591.21/31,278.96
  6. Step 6: Final answer
    x = 27,721.82

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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.