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Finding the Fourth Proportional to 16,771.20, 25,135.20 and 7,987.20

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Solution

The fourth proportional to 16,771.20, 25,135.20 and 7,987.20 is: 11,970.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,771.20 : 25,135.20 = 7,987.20 : x
  2. Step 2: Convert to fraction form
    16,771.20/25,135.20 = 7,987.20/x
  3. Step 3: Cross multiply
    16,771.20x = 25,135.20 × 7,987.20
  4. Step 4: Simplify right side
    16,771.20x = 200,759,869.44
  5. Step 5: Solve for x
    x = 200,759,869.44/16,771.20
  6. Step 6: Final answer
    x = 11,970.51

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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.