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Finding the Fourth Proportional to 8,385.36, 12,486.84 and 8,293.32

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Solution

The fourth proportional to 8,385.36, 12,486.84 and 8,293.32 is: 12,349.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.36 : 12,486.84 = 8,293.32 : x
  2. Step 2: Convert to fraction form
    8,385.36/12,486.84 = 8,293.32/x
  3. Step 3: Cross multiply
    8,385.36x = 12,486.84 × 8,293.32
  4. Step 4: Simplify right side
    8,385.36x = 103,557,359.91
  5. Step 5: Solve for x
    x = 103,557,359.91/8,385.36
  6. Step 6: Final answer
    x = 12,349.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.