Home / 6,121.90-8,449.55-3,886.84

Finding the Fourth Proportional to 6,121.90, 8,449.55 and 3,886.84

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Solution

The fourth proportional to 6,121.90, 8,449.55 and 3,886.84 is: 5,364.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.90 : 8,449.55 = 3,886.84 : x
  2. Step 2: Convert to fraction form
    6,121.90/8,449.55 = 3,886.84/x
  3. Step 3: Cross multiply
    6,121.90x = 8,449.55 × 3,886.84
  4. Step 4: Simplify right side
    6,121.90x = 32,842,048.92
  5. Step 5: Solve for x
    x = 32,842,048.92/6,121.90
  6. Step 6: Final answer
    x = 5,364.68

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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.