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Finding the Fourth Proportional to 13,611.96, 20,415.15 and 4,250.70

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Solution

The fourth proportional to 13,611.96, 20,415.15 and 4,250.70 is: 6,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.96 : 20,415.15 = 4,250.70 : x
  2. Step 2: Convert to fraction form
    13,611.96/20,415.15 = 4,250.70/x
  3. Step 3: Cross multiply
    13,611.96x = 20,415.15 × 4,250.70
  4. Step 4: Simplify right side
    13,611.96x = 86,778,678.11
  5. Step 5: Solve for x
    x = 86,778,678.11/13,611.96
  6. Step 6: Final answer
    x = 6,375.18

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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.