Home / 31,405.24-43,320-18,649.78

Finding the Fourth Proportional to 31,405.24, 43,320 and 18,649.78

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Solution

The fourth proportional to 31,405.24, 43,320 and 18,649.78 is: 25,725.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,405.24 : 43,320 = 18,649.78 : x
  2. Step 2: Convert to fraction form
    31,405.24/43,320 = 18,649.78/x
  3. Step 3: Cross multiply
    31,405.24x = 43,320 × 18,649.78
  4. Step 4: Simplify right side
    31,405.24x = 807,908,469.60
  5. Step 5: Solve for x
    x = 807,908,469.60/31,405.24
  6. Step 6: Final answer
    x = 25,725.28

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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.