Home / 20,949.42-28,910.15-11,518.14

Finding the Fourth Proportional to 20,949.42, 28,910.15 and 11,518.14

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Solution

The fourth proportional to 20,949.42, 28,910.15 and 11,518.14 is: 15,895.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.42 : 28,910.15 = 11,518.14 : x
  2. Step 2: Convert to fraction form
    20,949.42/28,910.15 = 11,518.14/x
  3. Step 3: Cross multiply
    20,949.42x = 28,910.15 × 11,518.14
  4. Step 4: Simplify right side
    20,949.42x = 332,991,155.12
  5. Step 5: Solve for x
    x = 332,991,155.12/20,949.42
  6. Step 6: Final answer
    x = 15,895.01

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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.