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Finding the Fourth Proportional to 20,801.66, 28,705.65 and 11,850.44

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Solution

The fourth proportional to 20,801.66, 28,705.65 and 11,850.44 is: 16,353.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.66 : 28,705.65 = 11,850.44 : x
  2. Step 2: Convert to fraction form
    20,801.66/28,705.65 = 11,850.44/x
  3. Step 3: Cross multiply
    20,801.66x = 28,705.65 × 11,850.44
  4. Step 4: Simplify right side
    20,801.66x = 340,174,582.99
  5. Step 5: Solve for x
    x = 340,174,582.99/20,801.66
  6. Step 6: Final answer
    x = 16,353.24

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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.