Home / 8,120.30-11,211.23-6,631.79

Finding the Fourth Proportional to 8,120.30, 11,211.23 and 6,631.79

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Solution

The fourth proportional to 8,120.30, 11,211.23 and 6,631.79 is: 9,156.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.30 : 11,211.23 = 6,631.79 : x
  2. Step 2: Convert to fraction form
    8,120.30/11,211.23 = 6,631.79/x
  3. Step 3: Cross multiply
    8,120.30x = 11,211.23 × 6,631.79
  4. Step 4: Simplify right side
    8,120.30x = 74,350,489.84
  5. Step 5: Solve for x
    x = 74,350,489.84/8,120.30
  6. Step 6: Final answer
    x = 9,156.13

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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.