Home / 31,443.18-43,388.92-18,520.39

Finding the Fourth Proportional to 31,443.18, 43,388.92 and 18,520.39

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Solution

The fourth proportional to 31,443.18, 43,388.92 and 18,520.39 is: 25,556.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,443.18 : 43,388.92 = 18,520.39 : x
  2. Step 2: Convert to fraction form
    31,443.18/43,388.92 = 18,520.39/x
  3. Step 3: Cross multiply
    31,443.18x = 43,388.92 × 18,520.39
  4. Step 4: Simplify right side
    31,443.18x = 803,579,720.08
  5. Step 5: Solve for x
    x = 803,579,720.08/31,443.18
  6. Step 6: Final answer
    x = 25,556.57

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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.