Home / 21,947.88-30,301.92-15,231.36

Finding the Fourth Proportional to 21,947.88, 30,301.92 and 15,231.36

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Solution

The fourth proportional to 21,947.88, 30,301.92 and 15,231.36 is: 21,028.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.88 : 30,301.92 = 15,231.36 : x
  2. Step 2: Convert to fraction form
    21,947.88/30,301.92 = 15,231.36/x
  3. Step 3: Cross multiply
    21,947.88x = 30,301.92 × 15,231.36
  4. Step 4: Simplify right side
    21,947.88x = 461,539,452.21
  5. Step 5: Solve for x
    x = 461,539,452.21/21,947.88
  6. Step 6: Final answer
    x = 21,028.89

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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.