Home / 28,286.50-39,036.60-15,711.25

Finding the Fourth Proportional to 28,286.50, 39,036.60 and 15,711.25

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Solution

The fourth proportional to 28,286.50, 39,036.60 and 15,711.25 is: 21,682.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,286.50 : 39,036.60 = 15,711.25 : x
  2. Step 2: Convert to fraction form
    28,286.50/39,036.60 = 15,711.25/x
  3. Step 3: Cross multiply
    28,286.50x = 39,036.60 × 15,711.25
  4. Step 4: Simplify right side
    28,286.50x = 613,313,781.75
  5. Step 5: Solve for x
    x = 613,313,781.75/28,286.50
  6. Step 6: Final answer
    x = 21,682.21

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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.