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Finding the Fourth Proportional to 18,299.90, 27,417.42 and 8,418.44

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Solution

The fourth proportional to 18,299.90, 27,417.42 and 8,418.44 is: 12,612.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,299.90 : 27,417.42 = 8,418.44 : x
  2. Step 2: Convert to fraction form
    18,299.90/27,417.42 = 8,418.44/x
  3. Step 3: Cross multiply
    18,299.90x = 27,417.42 × 8,418.44
  4. Step 4: Simplify right side
    18,299.90x = 230,811,905.22
  5. Step 5: Solve for x
    x = 230,811,905.22/18,299.90
  6. Step 6: Final answer
    x = 12,612.74

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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.