Home / 21,101.11-29,093.18-15,431.31

Finding the Fourth Proportional to 21,101.11, 29,093.18 and 15,431.31

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Solution

The fourth proportional to 21,101.11, 29,093.18 and 15,431.31 is: 21,275.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.11 : 29,093.18 = 15,431.31 : x
  2. Step 2: Convert to fraction form
    21,101.11/29,093.18 = 15,431.31/x
  3. Step 3: Cross multiply
    21,101.11x = 29,093.18 × 15,431.31
  4. Step 4: Simplify right side
    21,101.11x = 448,945,802.31
  5. Step 5: Solve for x
    x = 448,945,802.31/21,101.11
  6. Step 6: Final answer
    x = 21,275.94

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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.