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Finding the Fourth Proportional to 21,610.78, 29,822.88 and 11,674.78

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Solution

The fourth proportional to 21,610.78, 29,822.88 and 11,674.78 is: 16,111.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,610.78 : 29,822.88 = 11,674.78 : x
  2. Step 2: Convert to fraction form
    21,610.78/29,822.88 = 11,674.78/x
  3. Step 3: Cross multiply
    21,610.78x = 29,822.88 × 11,674.78
  4. Step 4: Simplify right side
    21,610.78x = 348,175,562.97
  5. Step 5: Solve for x
    x = 348,175,562.97/21,610.78
  6. Step 6: Final answer
    x = 16,111.20

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1.5x scale

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.