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Finding the Fourth Proportional to 18,803.40, 28,205.10 and 15,984.60

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Solution

The fourth proportional to 18,803.40, 28,205.10 and 15,984.60 is: 23,976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.40 : 28,205.10 = 15,984.60 : x
  2. Step 2: Convert to fraction form
    18,803.40/28,205.10 = 15,984.60/x
  3. Step 3: Cross multiply
    18,803.40x = 28,205.10 × 15,984.60
  4. Step 4: Simplify right side
    18,803.40x = 450,847,241.46
  5. Step 5: Solve for x
    x = 450,847,241.46/18,803.40
  6. Step 6: Final answer
    x = 23,976.90

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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.