Home / 28,628.78-39,507.82-15,882.22

Finding the Fourth Proportional to 28,628.78, 39,507.82 and 15,882.22

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Solution

The fourth proportional to 28,628.78, 39,507.82 and 15,882.22 is: 21,917.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,628.78 : 39,507.82 = 15,882.22 : x
  2. Step 2: Convert to fraction form
    28,628.78/39,507.82 = 15,882.22/x
  3. Step 3: Cross multiply
    28,628.78x = 39,507.82 × 15,882.22
  4. Step 4: Simplify right side
    28,628.78x = 627,471,676.41
  5. Step 5: Solve for x
    x = 627,471,676.41/28,628.78
  6. Step 6: Final answer
    x = 21,917.51

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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.