Home / 20,910.17-28,855.38-11,349.60

Finding the Fourth Proportional to 20,910.17, 28,855.38 and 11,349.60

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Solution

The fourth proportional to 20,910.17, 28,855.38 and 11,349.60 is: 15,662.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.17 : 28,855.38 = 11,349.60 : x
  2. Step 2: Convert to fraction form
    20,910.17/28,855.38 = 11,349.60/x
  3. Step 3: Cross multiply
    20,910.17x = 28,855.38 × 11,349.60
  4. Step 4: Simplify right side
    20,910.17x = 327,497,020.85
  5. Step 5: Solve for x
    x = 327,497,020.85/20,910.17
  6. Step 6: Final answer
    x = 15,662.10

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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.