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Finding the Fourth Proportional to 18,272.88, 27,372.64 and 8,398.40

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Solution

The fourth proportional to 18,272.88, 27,372.64 and 8,398.40 is: 12,580.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,272.88 : 27,372.64 = 8,398.40 : x
  2. Step 2: Convert to fraction form
    18,272.88/27,372.64 = 8,398.40/x
  3. Step 3: Cross multiply
    18,272.88x = 27,372.64 × 8,398.40
  4. Step 4: Simplify right side
    18,272.88x = 229,886,379.78
  5. Step 5: Solve for x
    x = 229,886,379.78/18,272.88
  6. Step 6: Final answer
    x = 12,580.74

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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.