Home / 2,820.66-3,890.79-2,157.27

Finding the Fourth Proportional to 2,820.66, 3,890.79 and 2,157.27

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Solution

The fourth proportional to 2,820.66, 3,890.79 and 2,157.27 is: 2,975.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.66 : 3,890.79 = 2,157.27 : x
  2. Step 2: Convert to fraction form
    2,820.66/3,890.79 = 2,157.27/x
  3. Step 3: Cross multiply
    2,820.66x = 3,890.79 × 2,157.27
  4. Step 4: Simplify right side
    2,820.66x = 8,393,484.54
  5. Step 5: Solve for x
    x = 8,393,484.54/2,820.66
  6. Step 6: Final answer
    x = 2,975.72

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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.