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Finding the Fourth Proportional to 18,757.60, 28,136.40 and 4,906.60

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Solution

The fourth proportional to 18,757.60, 28,136.40 and 4,906.60 is: 7,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.60 : 28,136.40 = 4,906.60 : x
  2. Step 2: Convert to fraction form
    18,757.60/28,136.40 = 4,906.60/x
  3. Step 3: Cross multiply
    18,757.60x = 28,136.40 × 4,906.60
  4. Step 4: Simplify right side
    18,757.60x = 138,054,060.24
  5. Step 5: Solve for x
    x = 138,054,060.24/18,757.60
  6. Step 6: Final answer
    x = 7,359.90

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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.