Home / 15,849.88-21,872.66-8,679.74

Finding the Fourth Proportional to 15,849.88, 21,872.66 and 8,679.74

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Solution

The fourth proportional to 15,849.88, 21,872.66 and 8,679.74 is: 11,977.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,849.88 : 21,872.66 = 8,679.74 : x
  2. Step 2: Convert to fraction form
    15,849.88/21,872.66 = 8,679.74/x
  3. Step 3: Cross multiply
    15,849.88x = 21,872.66 × 8,679.74
  4. Step 4: Simplify right side
    15,849.88x = 189,849,001.91
  5. Step 5: Solve for x
    x = 189,849,001.91/15,849.88
  6. Step 6: Final answer
    x = 11,977.95

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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.