Home / 5,120.47-7,680.71-2,346.42

Finding the Fourth Proportional to 5,120.47, 7,680.71 and 2,346.42

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Solution

The fourth proportional to 5,120.47, 7,680.71 and 2,346.42 is: 3,519.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.47 : 7,680.71 = 2,346.42 : x
  2. Step 2: Convert to fraction form
    5,120.47/7,680.71 = 2,346.42/x
  3. Step 3: Cross multiply
    5,120.47x = 7,680.71 × 2,346.42
  4. Step 4: Simplify right side
    5,120.47x = 18,022,171.56
  5. Step 5: Solve for x
    x = 18,022,171.56/5,120.47
  6. Step 6: Final answer
    x = 3,519.63

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.