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Finding the Fourth Proportional to 18,351.54, 27,528.48 and 7,815.60

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Solution

The fourth proportional to 18,351.54, 27,528.48 and 7,815.60 is: 11,723.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,351.54 : 27,528.48 = 7,815.60 : x
  2. Step 2: Convert to fraction form
    18,351.54/27,528.48 = 7,815.60/x
  3. Step 3: Cross multiply
    18,351.54x = 27,528.48 × 7,815.60
  4. Step 4: Simplify right side
    18,351.54x = 215,151,588.29
  5. Step 5: Solve for x
    x = 215,151,588.29/18,351.54
  6. Step 6: Final answer
    x = 11,723.90

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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.