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Finding the Fourth Proportional to 31,959.90, 44,115.03 and 21,351.90

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Solution

The fourth proportional to 31,959.90, 44,115.03 and 21,351.90 is: 29,472.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,959.90 : 44,115.03 = 21,351.90 : x
  2. Step 2: Convert to fraction form
    31,959.90/44,115.03 = 21,351.90/x
  3. Step 3: Cross multiply
    31,959.90x = 44,115.03 × 21,351.90
  4. Step 4: Simplify right side
    31,959.90x = 941,939,709.06
  5. Step 5: Solve for x
    x = 941,939,709.06/31,959.90
  6. Step 6: Final answer
    x = 29,472.55

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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.