Home / 21,105.28-31,589.24-15,556.40

Finding the Fourth Proportional to 21,105.28, 31,589.24 and 15,556.40

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Solution

The fourth proportional to 21,105.28, 31,589.24 and 15,556.40 is: 23,283.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.28 : 31,589.24 = 15,556.40 : x
  2. Step 2: Convert to fraction form
    21,105.28/31,589.24 = 15,556.40/x
  3. Step 3: Cross multiply
    21,105.28x = 31,589.24 × 15,556.40
  4. Step 4: Simplify right side
    21,105.28x = 491,414,853.14
  5. Step 5: Solve for x
    x = 491,414,853.14/21,105.28
  6. Step 6: Final answer
    x = 23,283.98

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1.5x scale

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.