Home / 31,286.40-43,176-17,139.28

Finding the Fourth Proportional to 31,286.40, 43,176 and 17,139.28

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Solution

The fourth proportional to 31,286.40, 43,176 and 17,139.28 is: 23,652.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,286.40 : 43,176 = 17,139.28 : x
  2. Step 2: Convert to fraction form
    31,286.40/43,176 = 17,139.28/x
  3. Step 3: Cross multiply
    31,286.40x = 43,176 × 17,139.28
  4. Step 4: Simplify right side
    31,286.40x = 740,005,553.28
  5. Step 5: Solve for x
    x = 740,005,553.28/31,286.40
  6. Step 6: Final answer
    x = 23,652.63

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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.