Home / 12,919.22-19,378.39-3,685.22

Finding the Fourth Proportional to 12,919.22, 19,378.39 and 3,685.22

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Solution

The fourth proportional to 12,919.22, 19,378.39 and 3,685.22 is: 5,527.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.22 : 19,378.39 = 3,685.22 : x
  2. Step 2: Convert to fraction form
    12,919.22/19,378.39 = 3,685.22/x
  3. Step 3: Cross multiply
    12,919.22x = 19,378.39 × 3,685.22
  4. Step 4: Simplify right side
    12,919.22x = 71,413,630.40
  5. Step 5: Solve for x
    x = 71,413,630.40/12,919.22
  6. Step 6: Final answer
    x = 5,527.70

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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.