Home / 30,614.42-42,249.79-20,387.92

Finding the Fourth Proportional to 30,614.42, 42,249.79 and 20,387.92

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Solution

The fourth proportional to 30,614.42, 42,249.79 and 20,387.92 is: 28,136.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,614.42 : 42,249.79 = 20,387.92 : x
  2. Step 2: Convert to fraction form
    30,614.42/42,249.79 = 20,387.92/x
  3. Step 3: Cross multiply
    30,614.42x = 42,249.79 × 20,387.92
  4. Step 4: Simplify right side
    30,614.42x = 861,385,338.54
  5. Step 5: Solve for x
    x = 861,385,338.54/30,614.42
  6. Step 6: Final answer
    x = 28,136.59

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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.