Home / 12,227.07-16,872.30-7,121.79

Finding the Fourth Proportional to 12,227.07, 16,872.30 and 7,121.79

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Solution

The fourth proportional to 12,227.07, 16,872.30 and 7,121.79 is: 9,827.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,227.07 : 16,872.30 = 7,121.79 : x
  2. Step 2: Convert to fraction form
    12,227.07/16,872.30 = 7,121.79/x
  3. Step 3: Cross multiply
    12,227.07x = 16,872.30 × 7,121.79
  4. Step 4: Simplify right side
    12,227.07x = 120,160,977.42
  5. Step 5: Solve for x
    x = 120,160,977.42/12,227.07
  6. Step 6: Final answer
    x = 9,827.46

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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.