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Finding the Fourth Proportional to 21,251, 29,327.62 and 12,301.61

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Solution

The fourth proportional to 21,251, 29,327.62 and 12,301.61 is: 16,976.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251 : 29,327.62 = 12,301.61 : x
  2. Step 2: Convert to fraction form
    21,251/29,327.62 = 12,301.61/x
  3. Step 3: Cross multiply
    21,251x = 29,327.62 × 12,301.61
  4. Step 4: Simplify right side
    21,251x = 360,776,943.47
  5. Step 5: Solve for x
    x = 360,776,943.47/21,251
  6. Step 6: Final answer
    x = 16,976.94

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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.