Home / 15,678.11-21,634.17-8,872.90

Finding the Fourth Proportional to 15,678.11, 21,634.17 and 8,872.90

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Solution

The fourth proportional to 15,678.11, 21,634.17 and 8,872.90 is: 12,243.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.11 : 21,634.17 = 8,872.90 : x
  2. Step 2: Convert to fraction form
    15,678.11/21,634.17 = 8,872.90/x
  3. Step 3: Cross multiply
    15,678.11x = 21,634.17 × 8,872.90
  4. Step 4: Simplify right side
    15,678.11x = 191,957,739.63
  5. Step 5: Solve for x
    x = 191,957,739.63/15,678.11
  6. Step 6: Final answer
    x = 12,243.68

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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.