Home / 7,128.56-9,837.26-3,984.75

Finding the Fourth Proportional to 7,128.56, 9,837.26 and 3,984.75

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Solution

The fourth proportional to 7,128.56, 9,837.26 and 3,984.75 is: 5,498.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.56 : 9,837.26 = 3,984.75 : x
  2. Step 2: Convert to fraction form
    7,128.56/9,837.26 = 3,984.75/x
  3. Step 3: Cross multiply
    7,128.56x = 9,837.26 × 3,984.75
  4. Step 4: Simplify right side
    7,128.56x = 39,199,001.86
  5. Step 5: Solve for x
    x = 39,199,001.86/7,128.56
  6. Step 6: Final answer
    x = 5,498.87

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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.