Home / 7,128.66-9,837.54-3,984.85

Finding the Fourth Proportional to 7,128.66, 9,837.54 and 3,984.85

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Solution

The fourth proportional to 7,128.66, 9,837.54 and 3,984.85 is: 5,499.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.66 : 9,837.54 = 3,984.85 : x
  2. Step 2: Convert to fraction form
    7,128.66/9,837.54 = 3,984.85/x
  3. Step 3: Cross multiply
    7,128.66x = 9,837.54 × 3,984.85
  4. Step 4: Simplify right side
    7,128.66x = 39,201,121.27
  5. Step 5: Solve for x
    x = 39,201,121.27/7,128.66
  6. Step 6: Final answer
    x = 5,499.09

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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.