Home / 19,742.80-29,621.10-12,338.56

Finding the Fourth Proportional to 19,742.80, 29,621.10 and 12,338.56

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Solution

The fourth proportional to 19,742.80, 29,621.10 and 12,338.56 is: 18,512.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,742.80 : 29,621.10 = 12,338.56 : x
  2. Step 2: Convert to fraction form
    19,742.80/29,621.10 = 12,338.56/x
  3. Step 3: Cross multiply
    19,742.80x = 29,621.10 × 12,338.56
  4. Step 4: Simplify right side
    19,742.80x = 365,481,719.62
  5. Step 5: Solve for x
    x = 365,481,719.62/19,742.80
  6. Step 6: Final answer
    x = 18,512.15

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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.