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Finding the Fourth Proportional to 18,109.92, 27,168.96 and 6,423.12

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Solution

The fourth proportional to 18,109.92, 27,168.96 and 6,423.12 is: 9,636.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109.92 : 27,168.96 = 6,423.12 : x
  2. Step 2: Convert to fraction form
    18,109.92/27,168.96 = 6,423.12/x
  3. Step 3: Cross multiply
    18,109.92x = 27,168.96 × 6,423.12
  4. Step 4: Simplify right side
    18,109.92x = 174,509,490.36
  5. Step 5: Solve for x
    x = 174,509,490.36/18,109.92
  6. Step 6: Final answer
    x = 9,636.13

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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.