Home / 5,128.97-7,077.98-2,771.12

Finding the Fourth Proportional to 5,128.97, 7,077.98 and 2,771.12

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Solution

The fourth proportional to 5,128.97, 7,077.98 and 2,771.12 is: 3,824.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.97 : 7,077.98 = 2,771.12 : x
  2. Step 2: Convert to fraction form
    5,128.97/7,077.98 = 2,771.12/x
  3. Step 3: Cross multiply
    5,128.97x = 7,077.98 × 2,771.12
  4. Step 4: Simplify right side
    5,128.97x = 19,613,903.48
  5. Step 5: Solve for x
    x = 19,613,903.48/5,128.97
  6. Step 6: Final answer
    x = 3,824.14

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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.