Home / 21,149.03-29,145.49-15,170.36

Finding the Fourth Proportional to 21,149.03, 29,145.49 and 15,170.36

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Solution

The fourth proportional to 21,149.03, 29,145.49 and 15,170.36 is: 20,906.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.03 : 29,145.49 = 15,170.36 : x
  2. Step 2: Convert to fraction form
    21,149.03/29,145.49 = 15,170.36/x
  3. Step 3: Cross multiply
    21,149.03x = 29,145.49 × 15,170.36
  4. Step 4: Simplify right side
    21,149.03x = 442,147,392.02
  5. Step 5: Solve for x
    x = 442,147,392.02/21,149.03
  6. Step 6: Final answer
    x = 20,906.27

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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.