Home / 11,143.30-15,369.20-8,158.06

Finding the Fourth Proportional to 11,143.30, 15,369.20 and 8,158.06

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Solution

The fourth proportional to 11,143.30, 15,369.20 and 8,158.06 is: 11,251.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,143.30 : 15,369.20 = 8,158.06 : x
  2. Step 2: Convert to fraction form
    11,143.30/15,369.20 = 8,158.06/x
  3. Step 3: Cross multiply
    11,143.30x = 15,369.20 × 8,158.06
  4. Step 4: Simplify right side
    11,143.30x = 125,382,855.75
  5. Step 5: Solve for x
    x = 125,382,855.75/11,143.30
  6. Step 6: Final answer
    x = 11,251.86

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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.