Home / 5,121.62-7,066.30-3,130.23

Finding the Fourth Proportional to 5,121.62, 7,066.30 and 3,130.23

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Solution

The fourth proportional to 5,121.62, 7,066.30 and 3,130.23 is: 4,318.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.62 : 7,066.30 = 3,130.23 : x
  2. Step 2: Convert to fraction form
    5,121.62/7,066.30 = 3,130.23/x
  3. Step 3: Cross multiply
    5,121.62x = 7,066.30 × 3,130.23
  4. Step 4: Simplify right side
    5,121.62x = 22,119,144.25
  5. Step 5: Solve for x
    x = 22,119,144.25/5,121.62
  6. Step 6: Final answer
    x = 4,318.78

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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.