Home / 31,815.72-43,909.20-18,205.02

Finding the Fourth Proportional to 31,815.72, 43,909.20 and 18,205.02

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Solution

The fourth proportional to 31,815.72, 43,909.20 and 18,205.02 is: 25,124.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,815.72 : 43,909.20 = 18,205.02 : x
  2. Step 2: Convert to fraction form
    31,815.72/43,909.20 = 18,205.02/x
  3. Step 3: Cross multiply
    31,815.72x = 43,909.20 × 18,205.02
  4. Step 4: Simplify right side
    31,815.72x = 799,367,864.18
  5. Step 5: Solve for x
    x = 799,367,864.18/31,815.72
  6. Step 6: Final answer
    x = 25,124.93

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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.