Home / 20,480.22-28,263.78-12,520.17

Finding the Fourth Proportional to 20,480.22, 28,263.78 and 12,520.17

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Solution

The fourth proportional to 20,480.22, 28,263.78 and 12,520.17 is: 17,278.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.22 : 28,263.78 = 12,520.17 : x
  2. Step 2: Convert to fraction form
    20,480.22/28,263.78 = 12,520.17/x
  3. Step 3: Cross multiply
    20,480.22x = 28,263.78 × 12,520.17
  4. Step 4: Simplify right side
    20,480.22x = 353,867,330.44
  5. Step 5: Solve for x
    x = 353,867,330.44/20,480.22
  6. Step 6: Final answer
    x = 17,278.49

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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.