Home / 18,765.78-28,144.46-5,616.48

Finding the Fourth Proportional to 18,765.78, 28,144.46 and 5,616.48

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Solution

The fourth proportional to 18,765.78, 28,144.46 and 5,616.48 is: 8,423.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.78 : 28,144.46 = 5,616.48 : x
  2. Step 2: Convert to fraction form
    18,765.78/28,144.46 = 5,616.48/x
  3. Step 3: Cross multiply
    18,765.78x = 28,144.46 × 5,616.48
  4. Step 4: Simplify right side
    18,765.78x = 158,072,796.70
  5. Step 5: Solve for x
    x = 158,072,796.70/18,765.78
  6. Step 6: Final answer
    x = 8,423.46

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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.