Home / 20,820.92-28,742.25-13,277.39

Finding the Fourth Proportional to 20,820.92, 28,742.25 and 13,277.39

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Solution

The fourth proportional to 20,820.92, 28,742.25 and 13,277.39 is: 18,328.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.92 : 28,742.25 = 13,277.39 : x
  2. Step 2: Convert to fraction form
    20,820.92/28,742.25 = 13,277.39/x
  3. Step 3: Cross multiply
    20,820.92x = 28,742.25 × 13,277.39
  4. Step 4: Simplify right side
    20,820.92x = 381,621,919.02
  5. Step 5: Solve for x
    x = 381,621,919.02/20,820.92
  6. Step 6: Final answer
    x = 18,328.78

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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.