Home / 12,121.91-18,191.16-4,726.43

Finding the Fourth Proportional to 12,121.91, 18,191.16 and 4,726.43

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Solution

The fourth proportional to 12,121.91, 18,191.16 and 4,726.43 is: 7,092.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.91 : 18,191.16 = 4,726.43 : x
  2. Step 2: Convert to fraction form
    12,121.91/18,191.16 = 4,726.43/x
  3. Step 3: Cross multiply
    12,121.91x = 18,191.16 × 4,726.43
  4. Step 4: Simplify right side
    12,121.91x = 85,979,153.40
  5. Step 5: Solve for x
    x = 85,979,153.40/12,121.91
  6. Step 6: Final answer
    x = 7,092.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.