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Finding the Fourth Proportional to 15,107.82, 20,847.96 and 8,392.98

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Solution

The fourth proportional to 15,107.82, 20,847.96 and 8,392.98 is: 11,581.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,107.82 : 20,847.96 = 8,392.98 : x
  2. Step 2: Convert to fraction form
    15,107.82/20,847.96 = 8,392.98/x
  3. Step 3: Cross multiply
    15,107.82x = 20,847.96 × 8,392.98
  4. Step 4: Simplify right side
    15,107.82x = 174,976,511.32
  5. Step 5: Solve for x
    x = 174,976,511.32/15,107.82
  6. Step 6: Final answer
    x = 11,581.85

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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.