Home / 21,342.89-29,451.99-11,912.06

Finding the Fourth Proportional to 21,342.89, 29,451.99 and 11,912.06

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Solution

The fourth proportional to 21,342.89, 29,451.99 and 11,912.06 is: 16,437.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.89 : 29,451.99 = 11,912.06 : x
  2. Step 2: Convert to fraction form
    21,342.89/29,451.99 = 11,912.06/x
  3. Step 3: Cross multiply
    21,342.89x = 29,451.99 × 11,912.06
  4. Step 4: Simplify right side
    21,342.89x = 350,833,872.00
  5. Step 5: Solve for x
    x = 350,833,872.00/21,342.89
  6. Step 6: Final answer
    x = 16,437.97

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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.