Home / 7,129.28-9,837.78-3,984.86

Finding the Fourth Proportional to 7,129.28, 9,837.78 and 3,984.86

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Solution

The fourth proportional to 7,129.28, 9,837.78 and 3,984.86 is: 5,498.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.28 : 9,837.78 = 3,984.86 : x
  2. Step 2: Convert to fraction form
    7,129.28/9,837.78 = 3,984.86/x
  3. Step 3: Cross multiply
    7,129.28x = 9,837.78 × 3,984.86
  4. Step 4: Simplify right side
    7,129.28x = 39,202,176.01
  5. Step 5: Solve for x
    x = 39,202,176.01/7,129.28
  6. Step 6: Final answer
    x = 5,498.76

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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.