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Finding the Fourth Proportional to 21,324.51, 29,427.39 and 12,372.89

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Solution

The fourth proportional to 21,324.51, 29,427.39 and 12,372.89 is: 17,074.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.51 : 29,427.39 = 12,372.89 : x
  2. Step 2: Convert to fraction form
    21,324.51/29,427.39 = 12,372.89/x
  3. Step 3: Cross multiply
    21,324.51x = 29,427.39 × 12,372.89
  4. Step 4: Simplify right side
    21,324.51x = 364,101,712.32
  5. Step 5: Solve for x
    x = 364,101,712.32/21,324.51
  6. Step 6: Final answer
    x = 17,074.33

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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.