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Finding the Fourth Proportional to 19,110.88, 28,654.68 and 8,578.86

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Solution

The fourth proportional to 19,110.88, 28,654.68 and 8,578.86 is: 12,863.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,110.88 : 28,654.68 = 8,578.86 : x
  2. Step 2: Convert to fraction form
    19,110.88/28,654.68 = 8,578.86/x
  3. Step 3: Cross multiply
    19,110.88x = 28,654.68 × 8,578.86
  4. Step 4: Simplify right side
    19,110.88x = 245,824,364.52
  5. Step 5: Solve for x
    x = 245,824,364.52/19,110.88
  6. Step 6: Final answer
    x = 12,863.06

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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.