Home / 15,760.94-21,748.38-8,686

Finding the Fourth Proportional to 15,760.94, 21,748.38 and 8,686

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Solution

The fourth proportional to 15,760.94, 21,748.38 and 8,686 is: 11,985.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,760.94 : 21,748.38 = 8,686 : x
  2. Step 2: Convert to fraction form
    15,760.94/21,748.38 = 8,686/x
  3. Step 3: Cross multiply
    15,760.94x = 21,748.38 × 8,686
  4. Step 4: Simplify right side
    15,760.94x = 188,906,428.68
  5. Step 5: Solve for x
    x = 188,906,428.68/15,760.94
  6. Step 6: Final answer
    x = 11,985.73

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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.