Home / 20,394.18-28,143.78-11,441.49

Finding the Fourth Proportional to 20,394.18, 28,143.78 and 11,441.49

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Solution

The fourth proportional to 20,394.18, 28,143.78 and 11,441.49 is: 15,789.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.18 : 28,143.78 = 11,441.49 : x
  2. Step 2: Convert to fraction form
    20,394.18/28,143.78 = 11,441.49/x
  3. Step 3: Cross multiply
    20,394.18x = 28,143.78 × 11,441.49
  4. Step 4: Simplify right side
    20,394.18x = 322,006,777.43
  5. Step 5: Solve for x
    x = 322,006,777.43/20,394.18
  6. Step 6: Final answer
    x = 15,789.15

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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.