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Finding the Fourth Proportional to 19,229.70, 28,844.55 and 11,880.90

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Solution

The fourth proportional to 19,229.70, 28,844.55 and 11,880.90 is: 17,821.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,229.70 : 28,844.55 = 11,880.90 : x
  2. Step 2: Convert to fraction form
    19,229.70/28,844.55 = 11,880.90/x
  3. Step 3: Cross multiply
    19,229.70x = 28,844.55 × 11,880.90
  4. Step 4: Simplify right side
    19,229.70x = 342,699,214.10
  5. Step 5: Solve for x
    x = 342,699,214.10/19,229.70
  6. Step 6: Final answer
    x = 17,821.35

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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.