Home / 20,394.80-28,144.72-11,442.30

Finding the Fourth Proportional to 20,394.80, 28,144.72 and 11,442.30

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Solution

The fourth proportional to 20,394.80, 28,144.72 and 11,442.30 is: 15,790.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.80 : 28,144.72 = 11,442.30 : x
  2. Step 2: Convert to fraction form
    20,394.80/28,144.72 = 11,442.30/x
  3. Step 3: Cross multiply
    20,394.80x = 28,144.72 × 11,442.30
  4. Step 4: Simplify right side
    20,394.80x = 322,040,329.66
  5. Step 5: Solve for x
    x = 322,040,329.66/20,394.80
  6. Step 6: Final answer
    x = 15,790.32

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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.