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Finding the Fourth Proportional to 8,361.92, 12,541.08 and 3,426.80

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Solution

The fourth proportional to 8,361.92, 12,541.08 and 3,426.80 is: 5,139.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,361.92 : 12,541.08 = 3,426.80 : x
  2. Step 2: Convert to fraction form
    8,361.92/12,541.08 = 3,426.80/x
  3. Step 3: Cross multiply
    8,361.92x = 12,541.08 × 3,426.80
  4. Step 4: Simplify right side
    8,361.92x = 42,975,772.94
  5. Step 5: Solve for x
    x = 42,975,772.94/8,361.92
  6. Step 6: Final answer
    x = 5,139.46

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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.