Home / 21,072.51-29,081.70-11,642.76

Finding the Fourth Proportional to 21,072.51, 29,081.70 and 11,642.76

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Solution

The fourth proportional to 21,072.51, 29,081.70 and 11,642.76 is: 16,067.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.51 : 29,081.70 = 11,642.76 : x
  2. Step 2: Convert to fraction form
    21,072.51/29,081.70 = 11,642.76/x
  3. Step 3: Cross multiply
    21,072.51x = 29,081.70 × 11,642.76
  4. Step 4: Simplify right side
    21,072.51x = 338,591,253.49
  5. Step 5: Solve for x
    x = 338,591,253.49/21,072.51
  6. Step 6: Final answer
    x = 16,067.91

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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.