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Finding the Fourth Proportional to 15,123.44, 20,863.08 and 9,819.92

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Solution

The fourth proportional to 15,123.44, 20,863.08 and 9,819.92 is: 13,546.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.44 : 20,863.08 = 9,819.92 : x
  2. Step 2: Convert to fraction form
    15,123.44/20,863.08 = 9,819.92/x
  3. Step 3: Cross multiply
    15,123.44x = 20,863.08 × 9,819.92
  4. Step 4: Simplify right side
    15,123.44x = 204,873,776.55
  5. Step 5: Solve for x
    x = 204,873,776.55/15,123.44
  6. Step 6: Final answer
    x = 13,546.77

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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.