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Finding the Fourth Proportional to 18,612.81, 27,929.48 and 8,224.29

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Solution

The fourth proportional to 18,612.81, 27,929.48 and 8,224.29 is: 12,340.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.81 : 27,929.48 = 8,224.29 : x
  2. Step 2: Convert to fraction form
    18,612.81/27,929.48 = 8,224.29/x
  3. Step 3: Cross multiply
    18,612.81x = 27,929.48 × 8,224.29
  4. Step 4: Simplify right side
    18,612.81x = 229,700,101.95
  5. Step 5: Solve for x
    x = 229,700,101.95/18,612.81
  6. Step 6: Final answer
    x = 12,340.97

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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.