Home / 31,338.80-43,238.92-20,167.28

Finding the Fourth Proportional to 31,338.80, 43,238.92 and 20,167.28

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Solution

The fourth proportional to 31,338.80, 43,238.92 and 20,167.28 is: 27,825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,338.80 : 43,238.92 = 20,167.28 : x
  2. Step 2: Convert to fraction form
    31,338.80/43,238.92 = 20,167.28/x
  3. Step 3: Cross multiply
    31,338.80x = 43,238.92 × 20,167.28
  4. Step 4: Simplify right side
    31,338.80x = 872,011,406.54
  5. Step 5: Solve for x
    x = 872,011,406.54/31,338.80
  6. Step 6: Final answer
    x = 27,825.30

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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.