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Finding the Fourth Proportional to 8,835.64, 12,188.10 and 5,517.88

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Solution

The fourth proportional to 8,835.64, 12,188.10 and 5,517.88 is: 7,611.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,835.64 : 12,188.10 = 5,517.88 : x
  2. Step 2: Convert to fraction form
    8,835.64/12,188.10 = 5,517.88/x
  3. Step 3: Cross multiply
    8,835.64x = 12,188.10 × 5,517.88
  4. Step 4: Simplify right side
    8,835.64x = 67,252,473.23
  5. Step 5: Solve for x
    x = 67,252,473.23/8,835.64
  6. Step 6: Final answer
    x = 7,611.50

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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.