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Finding the Fourth Proportional to 29,211.28, 40,311.54 and 15,963.28

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Solution

The fourth proportional to 29,211.28, 40,311.54 and 15,963.28 is: 22,029.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,211.28 : 40,311.54 = 15,963.28 : x
  2. Step 2: Convert to fraction form
    29,211.28/40,311.54 = 15,963.28/x
  3. Step 3: Cross multiply
    29,211.28x = 40,311.54 × 15,963.28
  4. Step 4: Simplify right side
    29,211.28x = 643,504,400.25
  5. Step 5: Solve for x
    x = 643,504,400.25/29,211.28
  6. Step 6: Final answer
    x = 22,029.31

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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.