Home / 11,329.36-15,640.19-7,082.78

Finding the Fourth Proportional to 11,329.36, 15,640.19 and 7,082.78

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Solution

The fourth proportional to 11,329.36, 15,640.19 and 7,082.78 is: 9,777.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,329.36 : 15,640.19 = 7,082.78 : x
  2. Step 2: Convert to fraction form
    11,329.36/15,640.19 = 7,082.78/x
  3. Step 3: Cross multiply
    11,329.36x = 15,640.19 × 7,082.78
  4. Step 4: Simplify right side
    11,329.36x = 110,775,964.43
  5. Step 5: Solve for x
    x = 110,775,964.43/11,329.36
  6. Step 6: Final answer
    x = 9,777.78

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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.