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Finding the Fourth Proportional to 18,390.42, 25,364.04 and 12,016.52

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Solution

The fourth proportional to 18,390.42, 25,364.04 and 12,016.52 is: 16,573.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.42 : 25,364.04 = 12,016.52 : x
  2. Step 2: Convert to fraction form
    18,390.42/25,364.04 = 12,016.52/x
  3. Step 3: Cross multiply
    18,390.42x = 25,364.04 × 12,016.52
  4. Step 4: Simplify right side
    18,390.42x = 304,787,493.94
  5. Step 5: Solve for x
    x = 304,787,493.94/18,390.42
  6. Step 6: Final answer
    x = 16,573.17

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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.