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Finding the Fourth Proportional to 20,630.44, 28,470.07 and 11,199

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Solution

The fourth proportional to 20,630.44, 28,470.07 and 11,199 is: 15,454.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.44 : 28,470.07 = 11,199 : x
  2. Step 2: Convert to fraction form
    20,630.44/28,470.07 = 11,199/x
  3. Step 3: Cross multiply
    20,630.44x = 28,470.07 × 11,199
  4. Step 4: Simplify right side
    20,630.44x = 318,836,313.93
  5. Step 5: Solve for x
    x = 318,836,313.93/20,630.44
  6. Step 6: Final answer
    x = 15,454.65

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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.