Home / 31,257.44-43,138.20-18,681.92

Finding the Fourth Proportional to 31,257.44, 43,138.20 and 18,681.92

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Solution

The fourth proportional to 31,257.44, 43,138.20 and 18,681.92 is: 25,782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,257.44 : 43,138.20 = 18,681.92 : x
  2. Step 2: Convert to fraction form
    31,257.44/43,138.20 = 18,681.92/x
  3. Step 3: Cross multiply
    31,257.44x = 43,138.20 × 18,681.92
  4. Step 4: Simplify right side
    31,257.44x = 805,904,401.34
  5. Step 5: Solve for x
    x = 805,904,401.34/31,257.44
  6. Step 6: Final answer
    x = 25,782.80

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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.