Home / 21,522.10-29,700.09-11,961.88

Finding the Fourth Proportional to 21,522.10, 29,700.09 and 11,961.88

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Solution

The fourth proportional to 21,522.10, 29,700.09 and 11,961.88 is: 16,507.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,522.10 : 29,700.09 = 11,961.88 : x
  2. Step 2: Convert to fraction form
    21,522.10/29,700.09 = 11,961.88/x
  3. Step 3: Cross multiply
    21,522.10x = 29,700.09 × 11,961.88
  4. Step 4: Simplify right side
    21,522.10x = 355,268,912.57
  5. Step 5: Solve for x
    x = 355,268,912.57/21,522.10
  6. Step 6: Final answer
    x = 16,507.17

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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.