Home / 21,081.49-29,093.01-11,521.78

Finding the Fourth Proportional to 21,081.49, 29,093.01 and 11,521.78

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Solution

The fourth proportional to 21,081.49, 29,093.01 and 11,521.78 is: 15,900.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.49 : 29,093.01 = 11,521.78 : x
  2. Step 2: Convert to fraction form
    21,081.49/29,093.01 = 11,521.78/x
  3. Step 3: Cross multiply
    21,081.49x = 29,093.01 × 11,521.78
  4. Step 4: Simplify right side
    21,081.49x = 335,203,260.76
  5. Step 5: Solve for x
    x = 335,203,260.76/21,081.49
  6. Step 6: Final answer
    x = 15,900.36

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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.