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Finding the Fourth Proportional to 12,611.85, 18,881.04 and 9,830.04

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Solution

The fourth proportional to 12,611.85, 18,881.04 and 9,830.04 is: 14,716.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.85 : 18,881.04 = 9,830.04 : x
  2. Step 2: Convert to fraction form
    12,611.85/18,881.04 = 9,830.04/x
  3. Step 3: Cross multiply
    12,611.85x = 18,881.04 × 9,830.04
  4. Step 4: Simplify right side
    12,611.85x = 185,601,378.44
  5. Step 5: Solve for x
    x = 185,601,378.44/12,611.85
  6. Step 6: Final answer
    x = 14,716.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.