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Finding the Fourth Proportional to 18,468.80, 27,703.20 and 5,321.60

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Solution

The fourth proportional to 18,468.80, 27,703.20 and 5,321.60 is: 7,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,468.80 : 27,703.20 = 5,321.60 : x
  2. Step 2: Convert to fraction form
    18,468.80/27,703.20 = 5,321.60/x
  3. Step 3: Cross multiply
    18,468.80x = 27,703.20 × 5,321.60
  4. Step 4: Simplify right side
    18,468.80x = 147,425,349.12
  5. Step 5: Solve for x
    x = 147,425,349.12/18,468.80
  6. Step 6: Final answer
    x = 7,982.40

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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.