Home / 12,381.45-17,086.35-6,716.20

Finding the Fourth Proportional to 12,381.45, 17,086.35 and 6,716.20

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Solution

The fourth proportional to 12,381.45, 17,086.35 and 6,716.20 is: 9,268.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.45 : 17,086.35 = 6,716.20 : x
  2. Step 2: Convert to fraction form
    12,381.45/17,086.35 = 6,716.20/x
  3. Step 3: Cross multiply
    12,381.45x = 17,086.35 × 6,716.20
  4. Step 4: Simplify right side
    12,381.45x = 114,755,347.20
  5. Step 5: Solve for x
    x = 114,755,347.20/12,381.45
  6. Step 6: Final answer
    x = 9,268.33

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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.