Home / 12,121.64-18,185.74-4,331.08

Finding the Fourth Proportional to 12,121.64, 18,185.74 and 4,331.08

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Solution

The fourth proportional to 12,121.64, 18,185.74 and 4,331.08 is: 6,497.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.64 : 18,185.74 = 4,331.08 : x
  2. Step 2: Convert to fraction form
    12,121.64/18,185.74 = 4,331.08/x
  3. Step 3: Cross multiply
    12,121.64x = 18,185.74 × 4,331.08
  4. Step 4: Simplify right side
    12,121.64x = 78,763,894.80
  5. Step 5: Solve for x
    x = 78,763,894.80/12,121.64
  6. Step 6: Final answer
    x = 6,497.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.