Home / 20,156.55-27,815.50-11,204.43

Finding the Fourth Proportional to 20,156.55, 27,815.50 and 11,204.43

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Solution

The fourth proportional to 20,156.55, 27,815.50 and 11,204.43 is: 15,461.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.55 : 27,815.50 = 11,204.43 : x
  2. Step 2: Convert to fraction form
    20,156.55/27,815.50 = 11,204.43/x
  3. Step 3: Cross multiply
    20,156.55x = 27,815.50 × 11,204.43
  4. Step 4: Simplify right side
    20,156.55x = 311,656,822.67
  5. Step 5: Solve for x
    x = 311,656,822.67/20,156.55
  6. Step 6: Final answer
    x = 15,461.81

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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.