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Finding the Fourth Proportional to 18,005.20, 27,007.80 and 11,083.60

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Solution

The fourth proportional to 18,005.20, 27,007.80 and 11,083.60 is: 16,625.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.20 : 27,007.80 = 11,083.60 : x
  2. Step 2: Convert to fraction form
    18,005.20/27,007.80 = 11,083.60/x
  3. Step 3: Cross multiply
    18,005.20x = 27,007.80 × 11,083.60
  4. Step 4: Simplify right side
    18,005.20x = 299,343,652.08
  5. Step 5: Solve for x
    x = 299,343,652.08/18,005.20
  6. Step 6: Final answer
    x = 16,625.40

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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.