Home / 5,120.86-7,066.92-2,882.81

Finding the Fourth Proportional to 5,120.86, 7,066.92 and 2,882.81

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Solution

The fourth proportional to 5,120.86, 7,066.92 and 2,882.81 is: 3,978.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.86 : 7,066.92 = 2,882.81 : x
  2. Step 2: Convert to fraction form
    5,120.86/7,066.92 = 2,882.81/x
  3. Step 3: Cross multiply
    5,120.86x = 7,066.92 × 2,882.81
  4. Step 4: Simplify right side
    5,120.86x = 20,372,573.23
  5. Step 5: Solve for x
    x = 20,372,573.23/5,120.86
  6. Step 6: Final answer
    x = 3,978.35

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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.