Home / 7,128.30-9,835.65-3,983.88

Finding the Fourth Proportional to 7,128.30, 9,835.65 and 3,983.88

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Solution

The fourth proportional to 7,128.30, 9,835.65 and 3,983.88 is: 5,496.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.30 : 9,835.65 = 3,983.88 : x
  2. Step 2: Convert to fraction form
    7,128.30/9,835.65 = 3,983.88/x
  3. Step 3: Cross multiply
    7,128.30x = 9,835.65 × 3,983.88
  4. Step 4: Simplify right side
    7,128.30x = 39,184,049.32
  5. Step 5: Solve for x
    x = 39,184,049.32/7,128.30
  6. Step 6: Final answer
    x = 5,496.97

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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.