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Finding the Fourth Proportional to 8,636.57, 12,957.48 and 4,479.55

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Solution

The fourth proportional to 8,636.57, 12,957.48 and 4,479.55 is: 6,720.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.57 : 12,957.48 = 4,479.55 : x
  2. Step 2: Convert to fraction form
    8,636.57/12,957.48 = 4,479.55/x
  3. Step 3: Cross multiply
    8,636.57x = 12,957.48 × 4,479.55
  4. Step 4: Simplify right side
    8,636.57x = 58,043,647.14
  5. Step 5: Solve for x
    x = 58,043,647.14/8,636.57
  6. Step 6: Final answer
    x = 6,720.69

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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.