Home / 11,391.36-17,090.89-7,177.78

Finding the Fourth Proportional to 11,391.36, 17,090.89 and 7,177.78

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Solution

The fourth proportional to 11,391.36, 17,090.89 and 7,177.78 is: 10,769.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.36 : 17,090.89 = 7,177.78 : x
  2. Step 2: Convert to fraction form
    11,391.36/17,090.89 = 7,177.78/x
  3. Step 3: Cross multiply
    11,391.36x = 17,090.89 × 7,177.78
  4. Step 4: Simplify right side
    11,391.36x = 122,674,648.42
  5. Step 5: Solve for x
    x = 122,674,648.42/11,391.36
  6. Step 6: Final answer
    x = 10,769.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.