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Finding the Fourth Proportional to 19,005.90, 28,508.85 and 11,229.90

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Solution

The fourth proportional to 19,005.90, 28,508.85 and 11,229.90 is: 16,844.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.90 : 28,508.85 = 11,229.90 : x
  2. Step 2: Convert to fraction form
    19,005.90/28,508.85 = 11,229.90/x
  3. Step 3: Cross multiply
    19,005.90x = 28,508.85 × 11,229.90
  4. Step 4: Simplify right side
    19,005.90x = 320,151,534.62
  5. Step 5: Solve for x
    x = 320,151,534.62/19,005.90
  6. Step 6: Final answer
    x = 16,844.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.