Home / 21,324.11-31,919.60-15,708.11

Finding the Fourth Proportional to 21,324.11, 31,919.60 and 15,708.11

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Solution

The fourth proportional to 21,324.11, 31,919.60 and 15,708.11 is: 23,513.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.11 : 31,919.60 = 15,708.11 : x
  2. Step 2: Convert to fraction form
    21,324.11/31,919.60 = 15,708.11/x
  3. Step 3: Cross multiply
    21,324.11x = 31,919.60 × 15,708.11
  4. Step 4: Simplify right side
    21,324.11x = 501,396,349.82
  5. Step 5: Solve for x
    x = 501,396,349.82/21,324.11
  6. Step 6: Final answer
    x = 23,513.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.