Home / 28,198.08-38,911.29-15,449.22

Finding the Fourth Proportional to 28,198.08, 38,911.29 and 15,449.22

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Solution

The fourth proportional to 28,198.08, 38,911.29 and 15,449.22 is: 21,318.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,198.08 : 38,911.29 = 15,449.22 : x
  2. Step 2: Convert to fraction form
    28,198.08/38,911.29 = 15,449.22/x
  3. Step 3: Cross multiply
    28,198.08x = 38,911.29 × 15,449.22
  4. Step 4: Simplify right side
    28,198.08x = 601,149,079.69
  5. Step 5: Solve for x
    x = 601,149,079.69/28,198.08
  6. Step 6: Final answer
    x = 21,318.79

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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.