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Finding the Fourth Proportional to 12,661.20, 18,970.20 and 10,803.60

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Solution

The fourth proportional to 12,661.20, 18,970.20 and 10,803.60 is: 16,186.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.20 : 18,970.20 = 10,803.60 : x
  2. Step 2: Convert to fraction form
    12,661.20/18,970.20 = 10,803.60/x
  3. Step 3: Cross multiply
    12,661.20x = 18,970.20 × 10,803.60
  4. Step 4: Simplify right side
    12,661.20x = 204,946,452.72
  5. Step 5: Solve for x
    x = 204,946,452.72/12,661.20
  6. Step 6: Final answer
    x = 16,186.97

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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.