Home / 20,119.20-27,791.55-15,461.70

Finding the Fourth Proportional to 20,119.20, 27,791.55 and 15,461.70

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Solution

The fourth proportional to 20,119.20, 27,791.55 and 15,461.70 is: 21,357.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,119.20 : 27,791.55 = 15,461.70 : x
  2. Step 2: Convert to fraction form
    20,119.20/27,791.55 = 15,461.70/x
  3. Step 3: Cross multiply
    20,119.20x = 27,791.55 × 15,461.70
  4. Step 4: Simplify right side
    20,119.20x = 429,704,608.64
  5. Step 5: Solve for x
    x = 429,704,608.64/20,119.20
  6. Step 6: Final answer
    x = 21,357.94

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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.