Home / 31,262.72-43,134-20,091.20

Finding the Fourth Proportional to 31,262.72, 43,134 and 20,091.20

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Solution

The fourth proportional to 31,262.72, 43,134 and 20,091.20 is: 27,720.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,262.72 : 43,134 = 20,091.20 : x
  2. Step 2: Convert to fraction form
    31,262.72/43,134 = 20,091.20/x
  3. Step 3: Cross multiply
    31,262.72x = 43,134 × 20,091.20
  4. Step 4: Simplify right side
    31,262.72x = 866,613,820.80
  5. Step 5: Solve for x
    x = 866,613,820.80/31,262.72
  6. Step 6: Final answer
    x = 27,720.36

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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.