Home / 28,414.72-39,212.31-15,839.47

Finding the Fourth Proportional to 28,414.72, 39,212.31 and 15,839.47

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Solution

The fourth proportional to 28,414.72, 39,212.31 and 15,839.47 is: 21,858.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,414.72 : 39,212.31 = 15,839.47 : x
  2. Step 2: Convert to fraction form
    28,414.72/39,212.31 = 15,839.47/x
  3. Step 3: Cross multiply
    28,414.72x = 39,212.31 × 15,839.47
  4. Step 4: Simplify right side
    28,414.72x = 621,102,228.16
  5. Step 5: Solve for x
    x = 621,102,228.16/28,414.72
  6. Step 6: Final answer
    x = 21,858.47

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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.