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Finding the Fourth Proportional to 12,612.40, 18,918.60 and 4,294.60

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Solution

The fourth proportional to 12,612.40, 18,918.60 and 4,294.60 is: 6,441.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.40 : 18,918.60 = 4,294.60 : x
  2. Step 2: Convert to fraction form
    12,612.40/18,918.60 = 4,294.60/x
  3. Step 3: Cross multiply
    12,612.40x = 18,918.60 × 4,294.60
  4. Step 4: Simplify right side
    12,612.40x = 81,247,819.56
  5. Step 5: Solve for x
    x = 81,247,819.56/12,612.40
  6. Step 6: Final answer
    x = 6,441.90

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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.