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Finding the Fourth Proportional to 25,863.20, 38,737.20 and 21,255.20

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Solution

The fourth proportional to 25,863.20, 38,737.20 and 21,255.20 is: 31,835.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,863.20 : 38,737.20 = 21,255.20 : x
  2. Step 2: Convert to fraction form
    25,863.20/38,737.20 = 21,255.20/x
  3. Step 3: Cross multiply
    25,863.20x = 38,737.20 × 21,255.20
  4. Step 4: Simplify right side
    25,863.20x = 823,366,933.44
  5. Step 5: Solve for x
    x = 823,366,933.44/25,863.20
  6. Step 6: Final answer
    x = 31,835.46

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1.5x scale

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.