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Finding the Fourth Proportional to 13,611.64, 20,425.74 and 6,219.64

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Solution

The fourth proportional to 13,611.64, 20,425.74 and 6,219.64 is: 9,333.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.64 : 20,425.74 = 6,219.64 : x
  2. Step 2: Convert to fraction form
    13,611.64/20,425.74 = 6,219.64/x
  3. Step 3: Cross multiply
    13,611.64x = 20,425.74 × 6,219.64
  4. Step 4: Simplify right side
    13,611.64x = 127,040,749.53
  5. Step 5: Solve for x
    x = 127,040,749.53/13,611.64
  6. Step 6: Final answer
    x = 9,333.24

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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.