Home / 12,128.46-18,192.69-3,809.21

Finding the Fourth Proportional to 12,128.46, 18,192.69 and 3,809.21

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Solution

The fourth proportional to 12,128.46, 18,192.69 and 3,809.21 is: 5,713.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.46 : 18,192.69 = 3,809.21 : x
  2. Step 2: Convert to fraction form
    12,128.46/18,192.69 = 3,809.21/x
  3. Step 3: Cross multiply
    12,128.46x = 18,192.69 × 3,809.21
  4. Step 4: Simplify right side
    12,128.46x = 69,299,776.67
  5. Step 5: Solve for x
    x = 69,299,776.67/12,128.46
  6. Step 6: Final answer
    x = 5,713.82

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.