Home / 12,179.16-16,808.58-7,144.20

Finding the Fourth Proportional to 12,179.16, 16,808.58 and 7,144.20

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Solution

The fourth proportional to 12,179.16, 16,808.58 and 7,144.20 is: 9,859.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.16 : 16,808.58 = 7,144.20 : x
  2. Step 2: Convert to fraction form
    12,179.16/16,808.58 = 7,144.20/x
  3. Step 3: Cross multiply
    12,179.16x = 16,808.58 × 7,144.20
  4. Step 4: Simplify right side
    12,179.16x = 120,083,857.24
  5. Step 5: Solve for x
    x = 120,083,857.24/12,179.16
  6. Step 6: Final answer
    x = 9,859.78

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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.