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Finding the Fourth Proportional to 27,131.70, 40,697.55 and 20,133.30

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Solution

The fourth proportional to 27,131.70, 40,697.55 and 20,133.30 is: 30,199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,131.70 : 40,697.55 = 20,133.30 : x
  2. Step 2: Convert to fraction form
    27,131.70/40,697.55 = 20,133.30/x
  3. Step 3: Cross multiply
    27,131.70x = 40,697.55 × 20,133.30
  4. Step 4: Simplify right side
    27,131.70x = 819,375,983.42
  5. Step 5: Solve for x
    x = 819,375,983.42/27,131.70
  6. Step 6: Final answer
    x = 30,199.95

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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.