Home / 31,832.78-43,949.13-20,507.90

Finding the Fourth Proportional to 31,832.78, 43,949.13 and 20,507.90

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Solution

The fourth proportional to 31,832.78, 43,949.13 and 20,507.90 is: 28,313.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,832.78 : 43,949.13 = 20,507.90 : x
  2. Step 2: Convert to fraction form
    31,832.78/43,949.13 = 20,507.90/x
  3. Step 3: Cross multiply
    31,832.78x = 43,949.13 × 20,507.90
  4. Step 4: Simplify right side
    31,832.78x = 901,304,363.13
  5. Step 5: Solve for x
    x = 901,304,363.13/31,832.78
  6. Step 6: Final answer
    x = 28,313.72

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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.