Home / 20,378.04-28,120.68-11,994

Finding the Fourth Proportional to 20,378.04, 28,120.68 and 11,994

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Solution

The fourth proportional to 20,378.04, 28,120.68 and 11,994 is: 16,551.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.04 : 28,120.68 = 11,994 : x
  2. Step 2: Convert to fraction form
    20,378.04/28,120.68 = 11,994/x
  3. Step 3: Cross multiply
    20,378.04x = 28,120.68 × 11,994
  4. Step 4: Simplify right side
    20,378.04x = 337,279,435.92
  5. Step 5: Solve for x
    x = 337,279,435.92/20,378.04
  6. Step 6: Final answer
    x = 16,551.12

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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.