Home / 12,087.40-16,679.78-6,781.80

Finding the Fourth Proportional to 12,087.40, 16,679.78 and 6,781.80

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Solution

The fourth proportional to 12,087.40, 16,679.78 and 6,781.80 is: 9,358.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.40 : 16,679.78 = 6,781.80 : x
  2. Step 2: Convert to fraction form
    12,087.40/16,679.78 = 6,781.80/x
  3. Step 3: Cross multiply
    12,087.40x = 16,679.78 × 6,781.80
  4. Step 4: Simplify right side
    12,087.40x = 113,118,932.00
  5. Step 5: Solve for x
    x = 113,118,932.00/12,087.40
  6. Step 6: Final answer
    x = 9,358.42

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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.