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Finding the Fourth Proportional to 21,395.58, 32,083.20 and 12,513.48

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Solution

The fourth proportional to 21,395.58, 32,083.20 and 12,513.48 is: 18,764.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,395.58 : 32,083.20 = 12,513.48 : x
  2. Step 2: Convert to fraction form
    21,395.58/32,083.20 = 12,513.48/x
  3. Step 3: Cross multiply
    21,395.58x = 32,083.20 × 12,513.48
  4. Step 4: Simplify right side
    21,395.58x = 401,472,481.54
  5. Step 5: Solve for x
    x = 401,472,481.54/21,395.58
  6. Step 6: Final answer
    x = 18,764.27

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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.