Home / 15,350.78-21,185.96-8,636.70

Finding the Fourth Proportional to 15,350.78, 21,185.96 and 8,636.70

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Solution

The fourth proportional to 15,350.78, 21,185.96 and 8,636.70 is: 11,919.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,350.78 : 21,185.96 = 8,636.70 : x
  2. Step 2: Convert to fraction form
    15,350.78/21,185.96 = 8,636.70/x
  3. Step 3: Cross multiply
    15,350.78x = 21,185.96 × 8,636.70
  4. Step 4: Simplify right side
    15,350.78x = 182,976,780.73
  5. Step 5: Solve for x
    x = 182,976,780.73/15,350.78
  6. Step 6: Final answer
    x = 11,919.71

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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.