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Finding the Fourth Proportional to 18,239.60, 25,174.58 and 11,520.97

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Solution

The fourth proportional to 18,239.60, 25,174.58 and 11,520.97 is: 15,901.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,239.60 : 25,174.58 = 11,520.97 : x
  2. Step 2: Convert to fraction form
    18,239.60/25,174.58 = 11,520.97/x
  3. Step 3: Cross multiply
    18,239.60x = 25,174.58 × 11,520.97
  4. Step 4: Simplify right side
    18,239.60x = 290,035,460.40
  5. Step 5: Solve for x
    x = 290,035,460.40/18,239.60
  6. Step 6: Final answer
    x = 15,901.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.