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Finding the Fourth Proportional to 8,705.32, 12,014.82 and 5,170.44

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Solution

The fourth proportional to 8,705.32, 12,014.82 and 5,170.44 is: 7,136.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.32 : 12,014.82 = 5,170.44 : x
  2. Step 2: Convert to fraction form
    8,705.32/12,014.82 = 5,170.44/x
  3. Step 3: Cross multiply
    8,705.32x = 12,014.82 × 5,170.44
  4. Step 4: Simplify right side
    8,705.32x = 62,121,905.92
  5. Step 5: Solve for x
    x = 62,121,905.92/8,705.32
  6. Step 6: Final answer
    x = 7,136.09

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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.