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Finding the Fourth Proportional to 18,789.52, 28,192.11 and 8,254.12

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Solution

The fourth proportional to 18,789.52, 28,192.11 and 8,254.12 is: 12,384.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.52 : 28,192.11 = 8,254.12 : x
  2. Step 2: Convert to fraction form
    18,789.52/28,192.11 = 8,254.12/x
  3. Step 3: Cross multiply
    18,789.52x = 28,192.11 × 8,254.12
  4. Step 4: Simplify right side
    18,789.52x = 232,701,058.99
  5. Step 5: Solve for x
    x = 232,701,058.99/18,789.52
  6. Step 6: Final answer
    x = 12,384.62

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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.