Home / 6,423.12-8,865-3,906.95

Finding the Fourth Proportional to 6,423.12, 8,865 and 3,906.95

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Solution

The fourth proportional to 6,423.12, 8,865 and 3,906.95 is: 5,392.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,423.12 : 8,865 = 3,906.95 : x
  2. Step 2: Convert to fraction form
    6,423.12/8,865 = 3,906.95/x
  3. Step 3: Cross multiply
    6,423.12x = 8,865 × 3,906.95
  4. Step 4: Simplify right side
    6,423.12x = 34,635,067.43
  5. Step 5: Solve for x
    x = 34,635,067.43/6,423.12
  6. Step 6: Final answer
    x = 5,392.25

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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.