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Finding the Fourth Proportional to 8,685.92, 13,026.22 and 3,138.58

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Solution

The fourth proportional to 8,685.92, 13,026.22 and 3,138.58 is: 4,706.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.92 : 13,026.22 = 3,138.58 : x
  2. Step 2: Convert to fraction form
    8,685.92/13,026.22 = 3,138.58/x
  3. Step 3: Cross multiply
    8,685.92x = 13,026.22 × 3,138.58
  4. Step 4: Simplify right side
    8,685.92x = 40,883,833.57
  5. Step 5: Solve for x
    x = 40,883,833.57/8,685.92
  6. Step 6: Final answer
    x = 4,706.91

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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.