Home / 3,798.20-5,239.98-2,805.74

Finding the Fourth Proportional to 3,798.20, 5,239.98 and 2,805.74

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Solution

The fourth proportional to 3,798.20, 5,239.98 and 2,805.74 is: 3,870.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,798.20 : 5,239.98 = 2,805.74 : x
  2. Step 2: Convert to fraction form
    3,798.20/5,239.98 = 2,805.74/x
  3. Step 3: Cross multiply
    3,798.20x = 5,239.98 × 2,805.74
  4. Step 4: Simplify right side
    3,798.20x = 14,702,021.49
  5. Step 5: Solve for x
    x = 14,702,021.49/3,798.20
  6. Step 6: Final answer
    x = 3,870.79

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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.