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Finding the Fourth Proportional to 12,612.64, 18,918.90 and 3,847.52

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Solution

The fourth proportional to 12,612.64, 18,918.90 and 3,847.52 is: 5,771.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.64 : 18,918.90 = 3,847.52 : x
  2. Step 2: Convert to fraction form
    12,612.64/18,918.90 = 3,847.52/x
  3. Step 3: Cross multiply
    12,612.64x = 18,918.90 × 3,847.52
  4. Step 4: Simplify right side
    12,612.64x = 72,790,846.13
  5. Step 5: Solve for x
    x = 72,790,846.13/12,612.64
  6. Step 6: Final answer
    x = 5,771.26

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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.