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Finding the Fourth Proportional to 25,811.20, 38,716.80 and 7,340.80

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Solution

The fourth proportional to 25,811.20, 38,716.80 and 7,340.80 is: 11,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,811.20 : 38,716.80 = 7,340.80 : x
  2. Step 2: Convert to fraction form
    25,811.20/38,716.80 = 7,340.80/x
  3. Step 3: Cross multiply
    25,811.20x = 38,716.80 × 7,340.80
  4. Step 4: Simplify right side
    25,811.20x = 284,212,285.44
  5. Step 5: Solve for x
    x = 284,212,285.44/25,811.20
  6. Step 6: Final answer
    x = 11,011.20

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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.