Home / 28,425.75-39,228.75-15,850.50

Finding the Fourth Proportional to 28,425.75, 39,228.75 and 15,850.50

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Solution

The fourth proportional to 28,425.75, 39,228.75 and 15,850.50 is: 21,874.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.75 : 39,228.75 = 15,850.50 : x
  2. Step 2: Convert to fraction form
    28,425.75/39,228.75 = 15,850.50/x
  3. Step 3: Cross multiply
    28,425.75x = 39,228.75 × 15,850.50
  4. Step 4: Simplify right side
    28,425.75x = 621,795,301.88
  5. Step 5: Solve for x
    x = 621,795,301.88/28,425.75
  6. Step 6: Final answer
    x = 21,874.37

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Half scale
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Double scale
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Similar ratio
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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.