Home / 31,344.80-43,247.20-20,173.28

Finding the Fourth Proportional to 31,344.80, 43,247.20 and 20,173.28

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Solution

The fourth proportional to 31,344.80, 43,247.20 and 20,173.28 is: 27,833.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,344.80 : 43,247.20 = 20,173.28 : x
  2. Step 2: Convert to fraction form
    31,344.80/43,247.20 = 20,173.28/x
  3. Step 3: Cross multiply
    31,344.80x = 43,247.20 × 20,173.28
  4. Step 4: Simplify right side
    31,344.80x = 872,437,874.82
  5. Step 5: Solve for x
    x = 872,437,874.82/31,344.80
  6. Step 6: Final answer
    x = 27,833.58

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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.