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Finding the Fourth Proportional to 21,919.95, 32,894.48 and 8,068.95

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Solution

The fourth proportional to 21,919.95, 32,894.48 and 8,068.95 is: 12,108.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.95 : 32,894.48 = 8,068.95 : x
  2. Step 2: Convert to fraction form
    21,919.95/32,894.48 = 8,068.95/x
  3. Step 3: Cross multiply
    21,919.95x = 32,894.48 × 8,068.95
  4. Step 4: Simplify right side
    21,919.95x = 265,423,934.57
  5. Step 5: Solve for x
    x = 265,423,934.57/21,919.95
  6. Step 6: Final answer
    x = 12,108.78

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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.