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Finding the Fourth Proportional to 18,612.36, 27,913.68 and 8,749.80

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Solution

The fourth proportional to 18,612.36, 27,913.68 and 8,749.80 is: 13,122.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.36 : 27,913.68 = 8,749.80 : x
  2. Step 2: Convert to fraction form
    18,612.36/27,913.68 = 8,749.80/x
  3. Step 3: Cross multiply
    18,612.36x = 27,913.68 × 8,749.80
  4. Step 4: Simplify right side
    18,612.36x = 244,239,117.26
  5. Step 5: Solve for x
    x = 244,239,117.26/18,612.36
  6. Step 6: Final answer
    x = 13,122.42

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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.