Home / 5,245.20-7,238.38-2,855.18

Finding the Fourth Proportional to 5,245.20, 7,238.38 and 2,855.18

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Solution

The fourth proportional to 5,245.20, 7,238.38 and 2,855.18 is: 3,940.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.20 : 7,238.38 = 2,855.18 : x
  2. Step 2: Convert to fraction form
    5,245.20/7,238.38 = 2,855.18/x
  3. Step 3: Cross multiply
    5,245.20x = 7,238.38 × 2,855.18
  4. Step 4: Simplify right side
    5,245.20x = 20,666,888.77
  5. Step 5: Solve for x
    x = 20,666,888.77/5,245.20
  6. Step 6: Final answer
    x = 3,940.15

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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.