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Finding the Fourth Proportional to 21,057.44, 29,061.05 and 12,108.02

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Solution

The fourth proportional to 21,057.44, 29,061.05 and 12,108.02 is: 16,710.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.44 : 29,061.05 = 12,108.02 : x
  2. Step 2: Convert to fraction form
    21,057.44/29,061.05 = 12,108.02/x
  3. Step 3: Cross multiply
    21,057.44x = 29,061.05 × 12,108.02
  4. Step 4: Simplify right side
    21,057.44x = 351,871,568.78
  5. Step 5: Solve for x
    x = 351,871,568.78/21,057.44
  6. Step 6: Final answer
    x = 16,710.09

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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.