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Finding the Fourth Proportional to 8,439.70, 12,661.72 and 3,244.18

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Solution

The fourth proportional to 8,439.70, 12,661.72 and 3,244.18 is: 4,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.70 : 12,661.72 = 3,244.18 : x
  2. Step 2: Convert to fraction form
    8,439.70/12,661.72 = 3,244.18/x
  3. Step 3: Cross multiply
    8,439.70x = 12,661.72 × 3,244.18
  4. Step 4: Simplify right side
    8,439.70x = 41,076,898.79
  5. Step 5: Solve for x
    x = 41,076,898.79/8,439.70
  6. Step 6: Final answer
    x = 4,867.10

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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.