Home / 31,720.65-43,776.27-18,112.71

Finding the Fourth Proportional to 31,720.65, 43,776.27 and 18,112.71

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Solution

The fourth proportional to 31,720.65, 43,776.27 and 18,112.71 is: 24,996.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.65 : 43,776.27 = 18,112.71 : x
  2. Step 2: Convert to fraction form
    31,720.65/43,776.27 = 18,112.71/x
  3. Step 3: Cross multiply
    31,720.65x = 43,776.27 × 18,112.71
  4. Step 4: Simplify right side
    31,720.65x = 792,906,883.39
  5. Step 5: Solve for x
    x = 792,906,883.39/31,720.65
  6. Step 6: Final answer
    x = 24,996.55

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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.