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Finding the Fourth Proportional to 13,893.66, 20,820.60 and 13,145.22

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Solution

The fourth proportional to 13,893.66, 20,820.60 and 13,145.22 is: 19,699.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,893.66 : 20,820.60 = 13,145.22 : x
  2. Step 2: Convert to fraction form
    13,893.66/20,820.60 = 13,145.22/x
  3. Step 3: Cross multiply
    13,893.66x = 20,820.60 × 13,145.22
  4. Step 4: Simplify right side
    13,893.66x = 273,691,367.53
  5. Step 5: Solve for x
    x = 273,691,367.53/13,893.66
  6. Step 6: Final answer
    x = 19,699.01

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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.