Home / 20,108.85-27,748.80-11,156.73

Finding the Fourth Proportional to 20,108.85, 27,748.80 and 11,156.73

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Solution

The fourth proportional to 20,108.85, 27,748.80 and 11,156.73 is: 15,395.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.85 : 27,748.80 = 11,156.73 : x
  2. Step 2: Convert to fraction form
    20,108.85/27,748.80 = 11,156.73/x
  3. Step 3: Cross multiply
    20,108.85x = 27,748.80 × 11,156.73
  4. Step 4: Simplify right side
    20,108.85x = 309,585,869.42
  5. Step 5: Solve for x
    x = 309,585,869.42/20,108.85
  6. Step 6: Final answer
    x = 15,395.50

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1.5x scale

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.