Home / 31,850.60-47,775.90-12,138.28

Finding the Fourth Proportional to 31,850.60, 47,775.90 and 12,138.28

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Solution

The fourth proportional to 31,850.60, 47,775.90 and 12,138.28 is: 18,207.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,850.60 : 47,775.90 = 12,138.28 : x
  2. Step 2: Convert to fraction form
    31,850.60/47,775.90 = 12,138.28/x
  3. Step 3: Cross multiply
    31,850.60x = 47,775.90 × 12,138.28
  4. Step 4: Simplify right side
    31,850.60x = 579,917,251.45
  5. Step 5: Solve for x
    x = 579,917,251.45/31,850.60
  6. Step 6: Final answer
    x = 18,207.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.