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Finding the Fourth Proportional to 15,994.64, 22,072.64 and 8,921.52

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Solution

The fourth proportional to 15,994.64, 22,072.64 and 8,921.52 is: 12,311.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,994.64 : 22,072.64 = 8,921.52 : x
  2. Step 2: Convert to fraction form
    15,994.64/22,072.64 = 8,921.52/x
  3. Step 3: Cross multiply
    15,994.64x = 22,072.64 × 8,921.52
  4. Step 4: Simplify right side
    15,994.64x = 196,921,499.21
  5. Step 5: Solve for x
    x = 196,921,499.21/15,994.64
  6. Step 6: Final answer
    x = 12,311.72

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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.