Home / 7,321.78-10,103.70-4,177.36

Finding the Fourth Proportional to 7,321.78, 10,103.70 and 4,177.36

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Solution

The fourth proportional to 7,321.78, 10,103.70 and 4,177.36 is: 5,764.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.78 : 10,103.70 = 4,177.36 : x
  2. Step 2: Convert to fraction form
    7,321.78/10,103.70 = 4,177.36/x
  3. Step 3: Cross multiply
    7,321.78x = 10,103.70 × 4,177.36
  4. Step 4: Simplify right side
    7,321.78x = 42,206,792.23
  5. Step 5: Solve for x
    x = 42,206,792.23/7,321.78
  6. Step 6: Final answer
    x = 5,764.55

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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.