Home / 20,849.56-28,772.40-11,418.70

Finding the Fourth Proportional to 20,849.56, 28,772.40 and 11,418.70

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Solution

The fourth proportional to 20,849.56, 28,772.40 and 11,418.70 is: 15,757.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,849.56 : 28,772.40 = 11,418.70 : x
  2. Step 2: Convert to fraction form
    20,849.56/28,772.40 = 11,418.70/x
  3. Step 3: Cross multiply
    20,849.56x = 28,772.40 × 11,418.70
  4. Step 4: Simplify right side
    20,849.56x = 328,543,403.88
  5. Step 5: Solve for x
    x = 328,543,403.88/20,849.56
  6. Step 6: Final answer
    x = 15,757.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.