Home / 20,489.03-28,272.78-15,114.39

Finding the Fourth Proportional to 20,489.03, 28,272.78 and 15,114.39

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Solution

The fourth proportional to 20,489.03, 28,272.78 and 15,114.39 is: 20,856.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.03 : 28,272.78 = 15,114.39 : x
  2. Step 2: Convert to fraction form
    20,489.03/28,272.78 = 15,114.39/x
  3. Step 3: Cross multiply
    20,489.03x = 28,272.78 × 15,114.39
  4. Step 4: Simplify right side
    20,489.03x = 427,325,920.20
  5. Step 5: Solve for x
    x = 427,325,920.20/20,489.03
  6. Step 6: Final answer
    x = 20,856.33

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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.