Home / 5,478.76-7,560.28-3,120.44

Finding the Fourth Proportional to 5,478.76, 7,560.28 and 3,120.44

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Solution

The fourth proportional to 5,478.76, 7,560.28 and 3,120.44 is: 4,305.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.76 : 7,560.28 = 3,120.44 : x
  2. Step 2: Convert to fraction form
    5,478.76/7,560.28 = 3,120.44/x
  3. Step 3: Cross multiply
    5,478.76x = 7,560.28 × 3,120.44
  4. Step 4: Simplify right side
    5,478.76x = 23,591,400.12
  5. Step 5: Solve for x
    x = 23,591,400.12/5,478.76
  6. Step 6: Final answer
    x = 4,305.97

Related Problems

Find fourth proportional to 2,739.38, 3,780.14 and 1,560.22
Half scale
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Double scale
Find fourth proportional to 5,479.76, 7,561.66 and 3,121.44
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.