Home / 20,679.62-28,522.60-13,119.44

Finding the Fourth Proportional to 20,679.62, 28,522.60 and 13,119.44

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Solution

The fourth proportional to 20,679.62, 28,522.60 and 13,119.44 is: 18,095.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.62 : 28,522.60 = 13,119.44 : x
  2. Step 2: Convert to fraction form
    20,679.62/28,522.60 = 13,119.44/x
  3. Step 3: Cross multiply
    20,679.62x = 28,522.60 × 13,119.44
  4. Step 4: Simplify right side
    20,679.62x = 374,200,539.34
  5. Step 5: Solve for x
    x = 374,200,539.34/20,679.62
  6. Step 6: Final answer
    x = 18,095.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.