Home / 18,961.56-28,449.72-7,865.46

Finding the Fourth Proportional to 18,961.56, 28,449.72 and 7,865.46

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Solution

The fourth proportional to 18,961.56, 28,449.72 and 7,865.46 is: 11,801.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.56 : 28,449.72 = 7,865.46 : x
  2. Step 2: Convert to fraction form
    18,961.56/28,449.72 = 7,865.46/x
  3. Step 3: Cross multiply
    18,961.56x = 28,449.72 × 7,865.46
  4. Step 4: Simplify right side
    18,961.56x = 223,770,134.67
  5. Step 5: Solve for x
    x = 223,770,134.67/18,961.56
  6. Step 6: Final answer
    x = 11,801.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.