Home / 31,621.71-43,608.29-20,294.76

Finding the Fourth Proportional to 31,621.71, 43,608.29 and 20,294.76

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Solution

The fourth proportional to 31,621.71, 43,608.29 and 20,294.76 is: 27,987.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,621.71 : 43,608.29 = 20,294.76 : x
  2. Step 2: Convert to fraction form
    31,621.71/43,608.29 = 20,294.76/x
  3. Step 3: Cross multiply
    31,621.71x = 43,608.29 × 20,294.76
  4. Step 4: Simplify right side
    31,621.71x = 885,019,779.56
  5. Step 5: Solve for x
    x = 885,019,779.56/31,621.71
  6. Step 6: Final answer
    x = 27,987.73

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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.