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Finding the Fourth Proportional to 20,449.95, 30,620.25 and 11,672.79

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Solution

The fourth proportional to 20,449.95, 30,620.25 and 11,672.79 is: 17,477.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.95 : 30,620.25 = 11,672.79 : x
  2. Step 2: Convert to fraction form
    20,449.95/30,620.25 = 11,672.79/x
  3. Step 3: Cross multiply
    20,449.95x = 30,620.25 × 11,672.79
  4. Step 4: Simplify right side
    20,449.95x = 357,423,748.00
  5. Step 5: Solve for x
    x = 357,423,748.00/20,449.95
  6. Step 6: Final answer
    x = 17,477.98

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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.