Home / 31,255.29-43,118.60-18,672.75

Finding the Fourth Proportional to 31,255.29, 43,118.60 and 18,672.75

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Solution

The fourth proportional to 31,255.29, 43,118.60 and 18,672.75 is: 25,760.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,255.29 : 43,118.60 = 18,672.75 : x
  2. Step 2: Convert to fraction form
    31,255.29/43,118.60 = 18,672.75/x
  3. Step 3: Cross multiply
    31,255.29x = 43,118.60 × 18,672.75
  4. Step 4: Simplify right side
    31,255.29x = 805,142,744.79
  5. Step 5: Solve for x
    x = 805,142,744.79/31,255.29
  6. Step 6: Final answer
    x = 25,760.21

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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.