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Finding the Fourth Proportional to 17,839.20, 26,750.44 and 7,978.56

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Solution

The fourth proportional to 17,839.20, 26,750.44 and 7,978.56 is: 11,964.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,839.20 : 26,750.44 = 7,978.56 : x
  2. Step 2: Convert to fraction form
    17,839.20/26,750.44 = 7,978.56/x
  3. Step 3: Cross multiply
    17,839.20x = 26,750.44 × 7,978.56
  4. Step 4: Simplify right side
    17,839.20x = 213,429,990.57
  5. Step 5: Solve for x
    x = 213,429,990.57/17,839.20
  6. Step 6: Final answer
    x = 11,964.10

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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.