Home / 12,185.78-16,816.28-6,881.64

Finding the Fourth Proportional to 12,185.78, 16,816.28 and 6,881.64

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Solution

The fourth proportional to 12,185.78, 16,816.28 and 6,881.64 is: 9,496.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.78 : 16,816.28 = 6,881.64 : x
  2. Step 2: Convert to fraction form
    12,185.78/16,816.28 = 6,881.64/x
  3. Step 3: Cross multiply
    12,185.78x = 16,816.28 × 6,881.64
  4. Step 4: Simplify right side
    12,185.78x = 115,723,585.10
  5. Step 5: Solve for x
    x = 115,723,585.10/12,185.78
  6. Step 6: Final answer
    x = 9,496.61

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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.