Home / 30,452.09-42,008.49-20,380.95

Finding the Fourth Proportional to 30,452.09, 42,008.49 and 20,380.95

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Solution

The fourth proportional to 30,452.09, 42,008.49 and 20,380.95 is: 28,115.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,452.09 : 42,008.49 = 20,380.95 : x
  2. Step 2: Convert to fraction form
    30,452.09/42,008.49 = 20,380.95/x
  3. Step 3: Cross multiply
    30,452.09x = 42,008.49 × 20,380.95
  4. Step 4: Simplify right side
    30,452.09x = 856,172,934.27
  5. Step 5: Solve for x
    x = 856,172,934.27/30,452.09
  6. Step 6: Final answer
    x = 28,115.41

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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.