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Finding the Fourth Proportional to 19,287, 28,920.08 and 10,407.11

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Solution

The fourth proportional to 19,287, 28,920.08 and 10,407.11 is: 15,605.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,287 : 28,920.08 = 10,407.11 : x
  2. Step 2: Convert to fraction form
    19,287/28,920.08 = 10,407.11/x
  3. Step 3: Cross multiply
    19,287x = 28,920.08 × 10,407.11
  4. Step 4: Simplify right side
    19,287x = 300,974,257.13
  5. Step 5: Solve for x
    x = 300,974,257.13/19,287
  6. Step 6: Final answer
    x = 15,605.03

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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.