Home / 20,441.30-28,219.20-13,378.51

Finding the Fourth Proportional to 20,441.30, 28,219.20 and 13,378.51

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Solution

The fourth proportional to 20,441.30, 28,219.20 and 13,378.51 is: 18,469.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,441.30 : 28,219.20 = 13,378.51 : x
  2. Step 2: Convert to fraction form
    20,441.30/28,219.20 = 13,378.51/x
  3. Step 3: Cross multiply
    20,441.30x = 28,219.20 × 13,378.51
  4. Step 4: Simplify right side
    20,441.30x = 377,530,849.39
  5. Step 5: Solve for x
    x = 377,530,849.39/20,441.30
  6. Step 6: Final answer
    x = 18,469.02

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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.