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Finding the Fourth Proportional to 20,247.78, 27,945.01 and 12,288.47

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Solution

The fourth proportional to 20,247.78, 27,945.01 and 12,288.47 is: 16,959.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,247.78 : 27,945.01 = 12,288.47 : x
  2. Step 2: Convert to fraction form
    20,247.78/27,945.01 = 12,288.47/x
  3. Step 3: Cross multiply
    20,247.78x = 27,945.01 × 12,288.47
  4. Step 4: Simplify right side
    20,247.78x = 343,401,246.59
  5. Step 5: Solve for x
    x = 343,401,246.59/20,247.78
  6. Step 6: Final answer
    x = 16,959.95

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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.