Home / 12,191.08-18,279.78-3,869.55

Finding the Fourth Proportional to 12,191.08, 18,279.78 and 3,869.55

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Solution

The fourth proportional to 12,191.08, 18,279.78 and 3,869.55 is: 5,802.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.08 : 18,279.78 = 3,869.55 : x
  2. Step 2: Convert to fraction form
    12,191.08/18,279.78 = 3,869.55/x
  3. Step 3: Cross multiply
    12,191.08x = 18,279.78 × 3,869.55
  4. Step 4: Simplify right side
    12,191.08x = 70,734,522.70
  5. Step 5: Solve for x
    x = 70,734,522.70/12,191.08
  6. Step 6: Final answer
    x = 5,802.15

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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.