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Finding the Fourth Proportional to 8,411.70, 12,617.58 and 2,865.66

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Solution

The fourth proportional to 8,411.70, 12,617.58 and 2,865.66 is: 4,298.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,411.70 : 12,617.58 = 2,865.66 : x
  2. Step 2: Convert to fraction form
    8,411.70/12,617.58 = 2,865.66/x
  3. Step 3: Cross multiply
    8,411.70x = 12,617.58 × 2,865.66
  4. Step 4: Simplify right side
    8,411.70x = 36,157,694.30
  5. Step 5: Solve for x
    x = 36,157,694.30/8,411.70
  6. Step 6: Final answer
    x = 4,298.50

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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.