Home / 21,540.43-29,725.40-11,980.27

Finding the Fourth Proportional to 21,540.43, 29,725.40 and 11,980.27

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Solution

The fourth proportional to 21,540.43, 29,725.40 and 11,980.27 is: 16,532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.43 : 29,725.40 = 11,980.27 : x
  2. Step 2: Convert to fraction form
    21,540.43/29,725.40 = 11,980.27/x
  3. Step 3: Cross multiply
    21,540.43x = 29,725.40 × 11,980.27
  4. Step 4: Simplify right side
    21,540.43x = 356,118,109.33
  5. Step 5: Solve for x
    x = 356,118,109.33/21,540.43
  6. Step 6: Final answer
    x = 16,532.55

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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.