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Finding the Fourth Proportional to 18,399.60, 27,599.40 and 11,838.60

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Solution

The fourth proportional to 18,399.60, 27,599.40 and 11,838.60 is: 17,757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.60 : 27,599.40 = 11,838.60 : x
  2. Step 2: Convert to fraction form
    18,399.60/27,599.40 = 11,838.60/x
  3. Step 3: Cross multiply
    18,399.60x = 27,599.40 × 11,838.60
  4. Step 4: Simplify right side
    18,399.60x = 326,738,256.84
  5. Step 5: Solve for x
    x = 326,738,256.84/18,399.60
  6. Step 6: Final answer
    x = 17,757.90

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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.