Home / 5,121.21-7,066.80-2,883.18

Finding the Fourth Proportional to 5,121.21, 7,066.80 and 2,883.18

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Solution

The fourth proportional to 5,121.21, 7,066.80 and 2,883.18 is: 3,978.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.21 : 7,066.80 = 2,883.18 : x
  2. Step 2: Convert to fraction form
    5,121.21/7,066.80 = 2,883.18/x
  3. Step 3: Cross multiply
    5,121.21x = 7,066.80 × 2,883.18
  4. Step 4: Simplify right side
    5,121.21x = 20,374,856.42
  5. Step 5: Solve for x
    x = 20,374,856.42/5,121.21
  6. Step 6: Final answer
    x = 3,978.52

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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.