Home / 31,871.28-43,979.76-18,443.46

Finding the Fourth Proportional to 31,871.28, 43,979.76 and 18,443.46

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Solution

The fourth proportional to 31,871.28, 43,979.76 and 18,443.46 is: 25,450.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,871.28 : 43,979.76 = 18,443.46 : x
  2. Step 2: Convert to fraction form
    31,871.28/43,979.76 = 18,443.46/x
  3. Step 3: Cross multiply
    31,871.28x = 43,979.76 × 18,443.46
  4. Step 4: Simplify right side
    31,871.28x = 811,138,944.37
  5. Step 5: Solve for x
    x = 811,138,944.37/31,871.28
  6. Step 6: Final answer
    x = 25,450.47

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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.