Home / 12,185.92-16,811.20-7,147.58

Finding the Fourth Proportional to 12,185.92, 16,811.20 and 7,147.58

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Solution

The fourth proportional to 12,185.92, 16,811.20 and 7,147.58 is: 9,860.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.92 : 16,811.20 = 7,147.58 : x
  2. Step 2: Convert to fraction form
    12,185.92/16,811.20 = 7,147.58/x
  3. Step 3: Cross multiply
    12,185.92x = 16,811.20 × 7,147.58
  4. Step 4: Simplify right side
    12,185.92x = 120,159,396.90
  5. Step 5: Solve for x
    x = 120,159,396.90/12,185.92
  6. Step 6: Final answer
    x = 9,860.51

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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.