Home / 20,874.04-28,805.09-11,919.78

Finding the Fourth Proportional to 20,874.04, 28,805.09 and 11,919.78

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Solution

The fourth proportional to 20,874.04, 28,805.09 and 11,919.78 is: 16,448.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.04 : 28,805.09 = 11,919.78 : x
  2. Step 2: Convert to fraction form
    20,874.04/28,805.09 = 11,919.78/x
  3. Step 3: Cross multiply
    20,874.04x = 28,805.09 × 11,919.78
  4. Step 4: Simplify right side
    20,874.04x = 343,350,276.08
  5. Step 5: Solve for x
    x = 343,350,276.08/20,874.04
  6. Step 6: Final answer
    x = 16,448.68

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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.