Home / 21,481.28-29,643.39-11,921.59

Finding the Fourth Proportional to 21,481.28, 29,643.39 and 11,921.59

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Solution

The fourth proportional to 21,481.28, 29,643.39 and 11,921.59 is: 16,451.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,481.28 : 29,643.39 = 11,921.59 : x
  2. Step 2: Convert to fraction form
    21,481.28/29,643.39 = 11,921.59/x
  3. Step 3: Cross multiply
    21,481.28x = 29,643.39 × 11,921.59
  4. Step 4: Simplify right side
    21,481.28x = 353,396,341.79
  5. Step 5: Solve for x
    x = 353,396,341.79/21,481.28
  6. Step 6: Final answer
    x = 16,451.36

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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.