Home / 18,521.28-27,780.12-10,198.56

Finding the Fourth Proportional to 18,521.28, 27,780.12 and 10,198.56

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Solution

The fourth proportional to 18,521.28, 27,780.12 and 10,198.56 is: 15,296.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521.28 : 27,780.12 = 10,198.56 : x
  2. Step 2: Convert to fraction form
    18,521.28/27,780.12 = 10,198.56/x
  3. Step 3: Cross multiply
    18,521.28x = 27,780.12 × 10,198.56
  4. Step 4: Simplify right side
    18,521.28x = 283,317,220.63
  5. Step 5: Solve for x
    x = 283,317,220.63/18,521.28
  6. Step 6: Final answer
    x = 15,296.85

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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.