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Finding the Fourth Proportional to 14,620.78, 20,177.16 and 8,332.78

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Solution

The fourth proportional to 14,620.78, 20,177.16 and 8,332.78 is: 11,499.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,620.78 : 20,177.16 = 8,332.78 : x
  2. Step 2: Convert to fraction form
    14,620.78/20,177.16 = 8,332.78/x
  3. Step 3: Cross multiply
    14,620.78x = 20,177.16 × 8,332.78
  4. Step 4: Simplify right side
    14,620.78x = 168,131,835.30
  5. Step 5: Solve for x
    x = 168,131,835.30/14,620.78
  6. Step 6: Final answer
    x = 11,499.51

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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.