Home / 15,786.96-21,786.14-8,616.93

Finding the Fourth Proportional to 15,786.96, 21,786.14 and 8,616.93

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Solution

The fourth proportional to 15,786.96, 21,786.14 and 8,616.93 is: 11,891.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.96 : 21,786.14 = 8,616.93 : x
  2. Step 2: Convert to fraction form
    15,786.96/21,786.14 = 8,616.93/x
  3. Step 3: Cross multiply
    15,786.96x = 21,786.14 × 8,616.93
  4. Step 4: Simplify right side
    15,786.96x = 187,729,600.27
  5. Step 5: Solve for x
    x = 187,729,600.27/15,786.96
  6. Step 6: Final answer
    x = 11,891.43

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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.