Home / 7,128.25-9,837.21-3,984.43

Finding the Fourth Proportional to 7,128.25, 9,837.21 and 3,984.43

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Solution

The fourth proportional to 7,128.25, 9,837.21 and 3,984.43 is: 5,498.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.25 : 9,837.21 = 3,984.43 : x
  2. Step 2: Convert to fraction form
    7,128.25/9,837.21 = 3,984.43/x
  3. Step 3: Cross multiply
    7,128.25x = 9,837.21 × 3,984.43
  4. Step 4: Simplify right side
    7,128.25x = 39,195,674.64
  5. Step 5: Solve for x
    x = 39,195,674.64/7,128.25
  6. Step 6: Final answer
    x = 5,498.64

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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.