Home / 7,120.54-10,680.81-5,185.06

Finding the Fourth Proportional to 7,120.54, 10,680.81 and 5,185.06

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Solution

The fourth proportional to 7,120.54, 10,680.81 and 5,185.06 is: 7,777.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.54 : 10,680.81 = 5,185.06 : x
  2. Step 2: Convert to fraction form
    7,120.54/10,680.81 = 5,185.06/x
  3. Step 3: Cross multiply
    7,120.54x = 10,680.81 × 5,185.06
  4. Step 4: Simplify right side
    7,120.54x = 55,380,640.70
  5. Step 5: Solve for x
    x = 55,380,640.70/7,120.54
  6. Step 6: Final answer
    x = 7,777.59

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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.