Home / 31,411.66-43,343.18-20,091.28

Finding the Fourth Proportional to 31,411.66, 43,343.18 and 20,091.28

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Solution

The fourth proportional to 31,411.66, 43,343.18 and 20,091.28 is: 27,722.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,411.66 : 43,343.18 = 20,091.28 : x
  2. Step 2: Convert to fraction form
    31,411.66/43,343.18 = 20,091.28/x
  3. Step 3: Cross multiply
    31,411.66x = 43,343.18 × 20,091.28
  4. Step 4: Simplify right side
    31,411.66x = 870,819,965.47
  5. Step 5: Solve for x
    x = 870,819,965.47/31,411.66
  6. Step 6: Final answer
    x = 27,722.83

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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.