Home / 21,081.51-29,091.54-11,649.87

Finding the Fourth Proportional to 21,081.51, 29,091.54 and 11,649.87

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Solution

The fourth proportional to 21,081.51, 29,091.54 and 11,649.87 is: 16,076.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.51 : 29,091.54 = 11,649.87 : x
  2. Step 2: Convert to fraction form
    21,081.51/29,091.54 = 11,649.87/x
  3. Step 3: Cross multiply
    21,081.51x = 29,091.54 × 11,649.87
  4. Step 4: Simplify right side
    21,081.51x = 338,912,659.10
  5. Step 5: Solve for x
    x = 338,912,659.10/21,081.51
  6. Step 6: Final answer
    x = 16,076.30

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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.