Home / 12,190.08-18,278.28-3,868.55

Finding the Fourth Proportional to 12,190.08, 18,278.28 and 3,868.55

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Solution

The fourth proportional to 12,190.08, 18,278.28 and 3,868.55 is: 5,800.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.08 : 18,278.28 = 3,868.55 : x
  2. Step 2: Convert to fraction form
    12,190.08/18,278.28 = 3,868.55/x
  3. Step 3: Cross multiply
    12,190.08x = 18,278.28 × 3,868.55
  4. Step 4: Simplify right side
    12,190.08x = 70,710,348.70
  5. Step 5: Solve for x
    x = 70,710,348.70/12,190.08
  6. Step 6: Final answer
    x = 5,800.65

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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.