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Finding the Fourth Proportional to 18,000.78, 27,005.13 and 5,522.52

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Solution

The fourth proportional to 18,000.78, 27,005.13 and 5,522.52 is: 8,284.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,000.78 : 27,005.13 = 5,522.52 : x
  2. Step 2: Convert to fraction form
    18,000.78/27,005.13 = 5,522.52/x
  3. Step 3: Cross multiply
    18,000.78x = 27,005.13 × 5,522.52
  4. Step 4: Simplify right side
    18,000.78x = 149,136,370.53
  5. Step 5: Solve for x
    x = 149,136,370.53/18,000.78
  6. Step 6: Final answer
    x = 8,284.99

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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.