Home / 7,115.24-9,819.96-3,972.08

Finding the Fourth Proportional to 7,115.24, 9,819.96 and 3,972.08

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Solution

The fourth proportional to 7,115.24, 9,819.96 and 3,972.08 is: 5,481.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.24 : 9,819.96 = 3,972.08 : x
  2. Step 2: Convert to fraction form
    7,115.24/9,819.96 = 3,972.08/x
  3. Step 3: Cross multiply
    7,115.24x = 9,819.96 × 3,972.08
  4. Step 4: Simplify right side
    7,115.24x = 39,005,666.72
  5. Step 5: Solve for x
    x = 39,005,666.72/7,115.24
  6. Step 6: Final answer
    x = 5,481.99

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1.5x scale

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.