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Finding the Fourth Proportional to 15,992.96, 22,071.72 and 8,919.92

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Solution

The fourth proportional to 15,992.96, 22,071.72 and 8,919.92 is: 12,310.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,992.96 : 22,071.72 = 8,919.92 : x
  2. Step 2: Convert to fraction form
    15,992.96/22,071.72 = 8,919.92/x
  3. Step 3: Cross multiply
    15,992.96x = 22,071.72 × 8,919.92
  4. Step 4: Simplify right side
    15,992.96x = 196,877,976.66
  5. Step 5: Solve for x
    x = 196,877,976.66/15,992.96
  6. Step 6: Final answer
    x = 12,310.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.