Home / 8,129.89-12,188.94-5,490.79

Finding the Fourth Proportional to 8,129.89, 12,188.94 and 5,490.79

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Solution

The fourth proportional to 8,129.89, 12,188.94 and 5,490.79 is: 8,232.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.89 : 12,188.94 = 5,490.79 : x
  2. Step 2: Convert to fraction form
    8,129.89/12,188.94 = 5,490.79/x
  3. Step 3: Cross multiply
    8,129.89x = 12,188.94 × 5,490.79
  4. Step 4: Simplify right side
    8,129.89x = 66,926,939.79
  5. Step 5: Solve for x
    x = 66,926,939.79/8,129.89
  6. Step 6: Final answer
    x = 8,232.21

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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.