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Finding the Fourth Proportional to 8,318.71, 12,479.87 and 3,873.07

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Solution

The fourth proportional to 8,318.71, 12,479.87 and 3,873.07 is: 5,810.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.71 : 12,479.87 = 3,873.07 : x
  2. Step 2: Convert to fraction form
    8,318.71/12,479.87 = 3,873.07/x
  3. Step 3: Cross multiply
    8,318.71x = 12,479.87 × 3,873.07
  4. Step 4: Simplify right side
    8,318.71x = 48,335,410.10
  5. Step 5: Solve for x
    x = 48,335,410.10/8,318.71
  6. Step 6: Final answer
    x = 5,810.45

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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.