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Finding the Fourth Proportional to 8,318.74, 12,477.94 and 2,772.49

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Solution

The fourth proportional to 8,318.74, 12,477.94 and 2,772.49 is: 4,158.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.74 : 12,477.94 = 2,772.49 : x
  2. Step 2: Convert to fraction form
    8,318.74/12,477.94 = 2,772.49/x
  3. Step 3: Cross multiply
    8,318.74x = 12,477.94 × 2,772.49
  4. Step 4: Simplify right side
    8,318.74x = 34,594,963.87
  5. Step 5: Solve for x
    x = 34,594,963.87/8,318.74
  6. Step 6: Final answer
    x = 4,158.68

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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.