Home / 12,819.18-17,684.19-9,981.54

Finding the Fourth Proportional to 12,819.18, 17,684.19 and 9,981.54

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Solution

The fourth proportional to 12,819.18, 17,684.19 and 9,981.54 is: 13,769.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,819.18 : 17,684.19 = 9,981.54 : x
  2. Step 2: Convert to fraction form
    12,819.18/17,684.19 = 9,981.54/x
  3. Step 3: Cross multiply
    12,819.18x = 17,684.19 × 9,981.54
  4. Step 4: Simplify right side
    12,819.18x = 176,515,449.85
  5. Step 5: Solve for x
    x = 176,515,449.85/12,819.18
  6. Step 6: Final answer
    x = 13,769.64

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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.