Home / 21,342.92-29,454.51-11,912.09

Finding the Fourth Proportional to 21,342.92, 29,454.51 and 11,912.09

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Solution

The fourth proportional to 21,342.92, 29,454.51 and 11,912.09 is: 16,439.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.92 : 29,454.51 = 11,912.09 : x
  2. Step 2: Convert to fraction form
    21,342.92/29,454.51 = 11,912.09/x
  3. Step 3: Cross multiply
    21,342.92x = 29,454.51 × 11,912.09
  4. Step 4: Simplify right side
    21,342.92x = 350,864,626.75
  5. Step 5: Solve for x
    x = 350,864,626.75/21,342.92
  6. Step 6: Final answer
    x = 16,439.40

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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.