Home / 5,120.79-7,066.62-2,997.78

Finding the Fourth Proportional to 5,120.79, 7,066.62 and 2,997.78

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Solution

The fourth proportional to 5,120.79, 7,066.62 and 2,997.78 is: 4,136.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.79 : 7,066.62 = 2,997.78 : x
  2. Step 2: Convert to fraction form
    5,120.79/7,066.62 = 2,997.78/x
  3. Step 3: Cross multiply
    5,120.79x = 7,066.62 × 2,997.78
  4. Step 4: Simplify right side
    5,120.79x = 21,184,172.10
  5. Step 5: Solve for x
    x = 21,184,172.10/5,120.79
  6. Step 6: Final answer
    x = 4,136.90

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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.