Home / 3,855.61-5,320.91-2,438.79

Finding the Fourth Proportional to 3,855.61, 5,320.91 and 2,438.79

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Solution

The fourth proportional to 3,855.61, 5,320.91 and 2,438.79 is: 3,365.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.61 : 5,320.91 = 2,438.79 : x
  2. Step 2: Convert to fraction form
    3,855.61/5,320.91 = 2,438.79/x
  3. Step 3: Cross multiply
    3,855.61x = 5,320.91 × 2,438.79
  4. Step 4: Simplify right side
    3,855.61x = 12,976,582.10
  5. Step 5: Solve for x
    x = 12,976,582.10/3,855.61
  6. Step 6: Final answer
    x = 3,365.64

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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.