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Finding the Fourth Proportional to 12,660.60, 18,990.90 and 10,200.23

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Solution

The fourth proportional to 12,660.60, 18,990.90 and 10,200.23 is: 15,300.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.60 : 18,990.90 = 10,200.23 : x
  2. Step 2: Convert to fraction form
    12,660.60/18,990.90 = 10,200.23/x
  3. Step 3: Cross multiply
    12,660.60x = 18,990.90 × 10,200.23
  4. Step 4: Simplify right side
    12,660.60x = 193,711,452.95
  5. Step 5: Solve for x
    x = 193,711,452.95/12,660.60
  6. Step 6: Final answer
    x = 15,300.34

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Similar ratio
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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.