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Finding the Fourth Proportional to 19,119.76, 28,696.92 and 8,034.64

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Solution

The fourth proportional to 19,119.76, 28,696.92 and 8,034.64 is: 12,059.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,119.76 : 28,696.92 = 8,034.64 : x
  2. Step 2: Convert to fraction form
    19,119.76/28,696.92 = 8,034.64/x
  3. Step 3: Cross multiply
    19,119.76x = 28,696.92 × 8,034.64
  4. Step 4: Simplify right side
    19,119.76x = 230,569,421.31
  5. Step 5: Solve for x
    x = 230,569,421.31/19,119.76
  6. Step 6: Final answer
    x = 12,059.22

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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.