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Finding the Fourth Proportional to 21,648.52, 29,875.06 and 11,712.52

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Solution

The fourth proportional to 21,648.52, 29,875.06 and 11,712.52 is: 16,163.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,648.52 : 29,875.06 = 11,712.52 : x
  2. Step 2: Convert to fraction form
    21,648.52/29,875.06 = 11,712.52/x
  3. Step 3: Cross multiply
    21,648.52x = 29,875.06 × 11,712.52
  4. Step 4: Simplify right side
    21,648.52x = 349,912,237.75
  5. Step 5: Solve for x
    x = 349,912,237.75/21,648.52
  6. Step 6: Final answer
    x = 16,163.33

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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.