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Finding the Fourth Proportional to 18,786, 28,188.72 and 9,552

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Solution

The fourth proportional to 18,786, 28,188.72 and 9,552 is: 14,332.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786 : 28,188.72 = 9,552 : x
  2. Step 2: Convert to fraction form
    18,786/28,188.72 = 9,552/x
  3. Step 3: Cross multiply
    18,786x = 28,188.72 × 9,552
  4. Step 4: Simplify right side
    18,786x = 269,258,653.44
  5. Step 5: Solve for x
    x = 269,258,653.44/18,786
  6. Step 6: Final answer
    x = 14,332.94

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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.