Home / 20,919.52-28,867.89-11,843.47

Finding the Fourth Proportional to 20,919.52, 28,867.89 and 11,843.47

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Solution

The fourth proportional to 20,919.52, 28,867.89 and 11,843.47 is: 16,343.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.52 : 28,867.89 = 11,843.47 : x
  2. Step 2: Convert to fraction form
    20,919.52/28,867.89 = 11,843.47/x
  3. Step 3: Cross multiply
    20,919.52x = 28,867.89 × 11,843.47
  4. Step 4: Simplify right side
    20,919.52x = 341,895,874.45
  5. Step 5: Solve for x
    x = 341,895,874.45/20,919.52
  6. Step 6: Final answer
    x = 16,343.39

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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.