Home / 12,379.20-18,571.80-3,614.40

Finding the Fourth Proportional to 12,379.20, 18,571.80 and 3,614.40

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Solution

The fourth proportional to 12,379.20, 18,571.80 and 3,614.40 is: 5,422.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.20 : 18,571.80 = 3,614.40 : x
  2. Step 2: Convert to fraction form
    12,379.20/18,571.80 = 3,614.40/x
  3. Step 3: Cross multiply
    12,379.20x = 18,571.80 × 3,614.40
  4. Step 4: Simplify right side
    12,379.20x = 67,125,913.92
  5. Step 5: Solve for x
    x = 67,125,913.92/12,379.20
  6. Step 6: Final answer
    x = 5,422.48

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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.