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Finding the Fourth Proportional to 8,682.64, 11,972.39 and 6,287.87

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Solution

The fourth proportional to 8,682.64, 11,972.39 and 6,287.87 is: 8,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.64 : 11,972.39 = 6,287.87 : x
  2. Step 2: Convert to fraction form
    8,682.64/11,972.39 = 6,287.87/x
  3. Step 3: Cross multiply
    8,682.64x = 11,972.39 × 6,287.87
  4. Step 4: Simplify right side
    8,682.64x = 75,280,831.91
  5. Step 5: Solve for x
    x = 75,280,831.91/8,682.64
  6. Step 6: Final answer
    x = 8,670.27

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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.