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Finding the Fourth Proportional to 36,639, 54,959.04 and 12,015

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Solution

The fourth proportional to 36,639, 54,959.04 and 12,015 is: 18,022.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,639 : 54,959.04 = 12,015 : x
  2. Step 2: Convert to fraction form
    36,639/54,959.04 = 12,015/x
  3. Step 3: Cross multiply
    36,639x = 54,959.04 × 12,015
  4. Step 4: Simplify right side
    36,639x = 660,332,865.60
  5. Step 5: Solve for x
    x = 660,332,865.60/36,639
  6. Step 6: Final answer
    x = 18,022.68

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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.