Home / 3,886.99-5,364.07-2,118.61

Finding the Fourth Proportional to 3,886.99, 5,364.07 and 2,118.61

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Solution

The fourth proportional to 3,886.99, 5,364.07 and 2,118.61 is: 2,923.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.99 : 5,364.07 = 2,118.61 : x
  2. Step 2: Convert to fraction form
    3,886.99/5,364.07 = 2,118.61/x
  3. Step 3: Cross multiply
    3,886.99x = 5,364.07 × 2,118.61
  4. Step 4: Simplify right side
    3,886.99x = 11,364,355.50
  5. Step 5: Solve for x
    x = 11,364,355.50/3,886.99
  6. Step 6: Final answer
    x = 2,923.69

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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.