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Finding the Fourth Proportional to 18,775.30, 25,910.49 and 10,819.12

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Solution

The fourth proportional to 18,775.30, 25,910.49 and 10,819.12 is: 14,930.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.30 : 25,910.49 = 10,819.12 : x
  2. Step 2: Convert to fraction form
    18,775.30/25,910.49 = 10,819.12/x
  3. Step 3: Cross multiply
    18,775.30x = 25,910.49 × 10,819.12
  4. Step 4: Simplify right side
    18,775.30x = 280,328,700.57
  5. Step 5: Solve for x
    x = 280,328,700.57/18,775.30
  6. Step 6: Final answer
    x = 14,930.72

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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.