Home / 31,920.31-47,878.66-14,145.85

Finding the Fourth Proportional to 31,920.31, 47,878.66 and 14,145.85

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Solution

The fourth proportional to 31,920.31, 47,878.66 and 14,145.85 is: 21,217.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,920.31 : 47,878.66 = 14,145.85 : x
  2. Step 2: Convert to fraction form
    31,920.31/47,878.66 = 14,145.85/x
  3. Step 3: Cross multiply
    31,920.31x = 47,878.66 × 14,145.85
  4. Step 4: Simplify right side
    31,920.31x = 677,284,342.56
  5. Step 5: Solve for x
    x = 677,284,342.56/31,920.31
  6. Step 6: Final answer
    x = 21,217.98

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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.