Home / 31,380.75-43,309.28-18,132.75

Finding the Fourth Proportional to 31,380.75, 43,309.28 and 18,132.75

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Solution

The fourth proportional to 31,380.75, 43,309.28 and 18,132.75 is: 25,025.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,380.75 : 43,309.28 = 18,132.75 : x
  2. Step 2: Convert to fraction form
    31,380.75/43,309.28 = 18,132.75/x
  3. Step 3: Cross multiply
    31,380.75x = 43,309.28 × 18,132.75
  4. Step 4: Simplify right side
    31,380.75x = 785,316,256.26
  5. Step 5: Solve for x
    x = 785,316,256.26/31,380.75
  6. Step 6: Final answer
    x = 25,025.41

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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.