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Finding the Fourth Proportional to 39,267, 54,188.46 and 21,603

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Solution

The fourth proportional to 39,267, 54,188.46 and 21,603 is: 29,812.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,267 : 54,188.46 = 21,603 : x
  2. Step 2: Convert to fraction form
    39,267/54,188.46 = 21,603/x
  3. Step 3: Cross multiply
    39,267x = 54,188.46 × 21,603
  4. Step 4: Simplify right side
    39,267x = 1,170,633,301.38
  5. Step 5: Solve for x
    x = 1,170,633,301.38/39,267
  6. Step 6: Final answer
    x = 29,812.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.