Home / 8,211.81-12,317.97-2,665.20

Finding the Fourth Proportional to 8,211.81, 12,317.97 and 2,665.20

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Solution

The fourth proportional to 8,211.81, 12,317.97 and 2,665.20 is: 3,997.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211.81 : 12,317.97 = 2,665.20 : x
  2. Step 2: Convert to fraction form
    8,211.81/12,317.97 = 2,665.20/x
  3. Step 3: Cross multiply
    8,211.81x = 12,317.97 × 2,665.20
  4. Step 4: Simplify right side
    8,211.81x = 32,829,853.64
  5. Step 5: Solve for x
    x = 32,829,853.64/8,211.81
  6. Step 6: Final answer
    x = 3,997.88

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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.