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Finding the Fourth Proportional to 13,892.08, 20,820.01 and 12,132.91

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Solution

The fourth proportional to 13,892.08, 20,820.01 and 12,132.91 is: 18,183.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,892.08 : 20,820.01 = 12,132.91 : x
  2. Step 2: Convert to fraction form
    13,892.08/20,820.01 = 12,132.91/x
  3. Step 3: Cross multiply
    13,892.08x = 20,820.01 × 12,132.91
  4. Step 4: Simplify right side
    13,892.08x = 252,607,307.53
  5. Step 5: Solve for x
    x = 252,607,307.53/13,892.08
  6. Step 6: Final answer
    x = 18,183.55

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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.