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Finding the Fourth Proportional to 19,129.80, 28,696.48 and 7,443.90

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Solution

The fourth proportional to 19,129.80, 28,696.48 and 7,443.90 is: 11,166.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,129.80 : 28,696.48 = 7,443.90 : x
  2. Step 2: Convert to fraction form
    19,129.80/28,696.48 = 7,443.90/x
  3. Step 3: Cross multiply
    19,129.80x = 28,696.48 × 7,443.90
  4. Step 4: Simplify right side
    19,129.80x = 213,613,727.47
  5. Step 5: Solve for x
    x = 213,613,727.47/19,129.80
  6. Step 6: Final answer
    x = 11,166.54

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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.