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Finding the Fourth Proportional to 25,711.70, 38,571.65 and 7,938.18

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Solution

The fourth proportional to 25,711.70, 38,571.65 and 7,938.18 is: 11,908.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,711.70 : 38,571.65 = 7,938.18 : x
  2. Step 2: Convert to fraction form
    25,711.70/38,571.65 = 7,938.18/x
  3. Step 3: Cross multiply
    25,711.70x = 38,571.65 × 7,938.18
  4. Step 4: Simplify right side
    25,711.70x = 306,188,720.44
  5. Step 5: Solve for x
    x = 306,188,720.44/25,711.70
  6. Step 6: Final answer
    x = 11,908.54

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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.