Home / 12,981.20-19,434-9,708.80

Finding the Fourth Proportional to 12,981.20, 19,434 and 9,708.80

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Solution

The fourth proportional to 12,981.20, 19,434 and 9,708.80 is: 14,534.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.20 : 19,434 = 9,708.80 : x
  2. Step 2: Convert to fraction form
    12,981.20/19,434 = 9,708.80/x
  3. Step 3: Cross multiply
    12,981.20x = 19,434 × 9,708.80
  4. Step 4: Simplify right side
    12,981.20x = 188,680,819.20
  5. Step 5: Solve for x
    x = 188,680,819.20/12,981.20
  6. Step 6: Final answer
    x = 14,534.93

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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.