Home / 12,949.20-17,876.40-7,645.68

Finding the Fourth Proportional to 12,949.20, 17,876.40 and 7,645.68

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Solution

The fourth proportional to 12,949.20, 17,876.40 and 7,645.68 is: 10,554.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,949.20 : 17,876.40 = 7,645.68 : x
  2. Step 2: Convert to fraction form
    12,949.20/17,876.40 = 7,645.68/x
  3. Step 3: Cross multiply
    12,949.20x = 17,876.40 × 7,645.68
  4. Step 4: Simplify right side
    12,949.20x = 136,677,233.95
  5. Step 5: Solve for x
    x = 136,677,233.95/12,949.20
  6. Step 6: Final answer
    x = 10,554.88

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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.