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Finding the Fourth Proportional to 21,753.29, 30,018.09 and 12,799.05

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Solution

The fourth proportional to 21,753.29, 30,018.09 and 12,799.05 is: 17,661.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,753.29 : 30,018.09 = 12,799.05 : x
  2. Step 2: Convert to fraction form
    21,753.29/30,018.09 = 12,799.05/x
  3. Step 3: Cross multiply
    21,753.29x = 30,018.09 × 12,799.05
  4. Step 4: Simplify right side
    21,753.29x = 384,202,970.24
  5. Step 5: Solve for x
    x = 384,202,970.24/21,753.29
  6. Step 6: Final answer
    x = 17,661.83

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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.