Home / 20,909.87-28,855.49-11,349.94

Finding the Fourth Proportional to 20,909.87, 28,855.49 and 11,349.94

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Solution

The fourth proportional to 20,909.87, 28,855.49 and 11,349.94 is: 15,662.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.87 : 28,855.49 = 11,349.94 : x
  2. Step 2: Convert to fraction form
    20,909.87/28,855.49 = 11,349.94/x
  3. Step 3: Cross multiply
    20,909.87x = 28,855.49 × 11,349.94
  4. Step 4: Simplify right side
    20,909.87x = 327,508,080.17
  5. Step 5: Solve for x
    x = 327,508,080.17/20,909.87
  6. Step 6: Final answer
    x = 15,662.85

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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.