Home / 22,161.20-30,579.42-12,729.76

Finding the Fourth Proportional to 22,161.20, 30,579.42 and 12,729.76

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Solution

The fourth proportional to 22,161.20, 30,579.42 and 12,729.76 is: 17,565.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,161.20 : 30,579.42 = 12,729.76 : x
  2. Step 2: Convert to fraction form
    22,161.20/30,579.42 = 12,729.76/x
  3. Step 3: Cross multiply
    22,161.20x = 30,579.42 × 12,729.76
  4. Step 4: Simplify right side
    22,161.20x = 389,268,648.83
  5. Step 5: Solve for x
    x = 389,268,648.83/22,161.20
  6. Step 6: Final answer
    x = 17,565.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.