Home / 21,646.30-29,872.11-12,699.10

Finding the Fourth Proportional to 21,646.30, 29,872.11 and 12,699.10

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Solution

The fourth proportional to 21,646.30, 29,872.11 and 12,699.10 is: 17,524.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,646.30 : 29,872.11 = 12,699.10 : x
  2. Step 2: Convert to fraction form
    21,646.30/29,872.11 = 12,699.10/x
  3. Step 3: Cross multiply
    21,646.30x = 29,872.11 × 12,699.10
  4. Step 4: Simplify right side
    21,646.30x = 379,348,912.10
  5. Step 5: Solve for x
    x = 379,348,912.10/21,646.30
  6. Step 6: Final answer
    x = 17,524.88

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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.