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Finding the Fourth Proportional to 13,611.72, 20,419.53 and 4,844.55

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Solution

The fourth proportional to 13,611.72, 20,419.53 and 4,844.55 is: 7,267.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.72 : 20,419.53 = 4,844.55 : x
  2. Step 2: Convert to fraction form
    13,611.72/20,419.53 = 4,844.55/x
  3. Step 3: Cross multiply
    13,611.72x = 20,419.53 × 4,844.55
  4. Step 4: Simplify right side
    13,611.72x = 98,923,434.06
  5. Step 5: Solve for x
    x = 98,923,434.06/13,611.72
  6. Step 6: Final answer
    x = 7,267.52

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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.