Home / 2,686.96-3,705.60-2,120.14

Finding the Fourth Proportional to 2,686.96, 3,705.60 and 2,120.14

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Solution

The fourth proportional to 2,686.96, 3,705.60 and 2,120.14 is: 2,923.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.96 : 3,705.60 = 2,120.14 : x
  2. Step 2: Convert to fraction form
    2,686.96/3,705.60 = 2,120.14/x
  3. Step 3: Cross multiply
    2,686.96x = 3,705.60 × 2,120.14
  4. Step 4: Simplify right side
    2,686.96x = 7,856,390.78
  5. Step 5: Solve for x
    x = 7,856,390.78/2,686.96
  6. Step 6: Final answer
    x = 2,923.90

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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.