Home / 12,381.68-17,086.88-6,716.48

Finding the Fourth Proportional to 12,381.68, 17,086.88 and 6,716.48

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Solution

The fourth proportional to 12,381.68, 17,086.88 and 6,716.48 is: 9,268.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.68 : 17,086.88 = 6,716.48 : x
  2. Step 2: Convert to fraction form
    12,381.68/17,086.88 = 6,716.48/x
  3. Step 3: Cross multiply
    12,381.68x = 17,086.88 × 6,716.48
  4. Step 4: Simplify right side
    12,381.68x = 114,763,619.14
  5. Step 5: Solve for x
    x = 114,763,619.14/12,381.68
  6. Step 6: Final answer
    x = 9,268.82

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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.