Home / 12,213.68-18,320.32-4,420.56

Finding the Fourth Proportional to 12,213.68, 18,320.32 and 4,420.56

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Solution

The fourth proportional to 12,213.68, 18,320.32 and 4,420.56 is: 6,630.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.68 : 18,320.32 = 4,420.56 : x
  2. Step 2: Convert to fraction form
    12,213.68/18,320.32 = 4,420.56/x
  3. Step 3: Cross multiply
    12,213.68x = 18,320.32 × 4,420.56
  4. Step 4: Simplify right side
    12,213.68x = 80,986,073.78
  5. Step 5: Solve for x
    x = 80,986,073.78/12,213.68
  6. Step 6: Final answer
    x = 6,630.77

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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.