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Finding the Fourth Proportional to 18,429.76, 27,639.78 and 6,743.08

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Solution

The fourth proportional to 18,429.76, 27,639.78 and 6,743.08 is: 10,112.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429.76 : 27,639.78 = 6,743.08 : x
  2. Step 2: Convert to fraction form
    18,429.76/27,639.78 = 6,743.08/x
  3. Step 3: Cross multiply
    18,429.76x = 27,639.78 × 6,743.08
  4. Step 4: Simplify right side
    18,429.76x = 186,377,247.72
  5. Step 5: Solve for x
    x = 186,377,247.72/18,429.76
  6. Step 6: Final answer
    x = 10,112.84

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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.