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Finding the Fourth Proportional to 20,480.76, 28,267.50 and 11,983.80

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Solution

The fourth proportional to 20,480.76, 28,267.50 and 11,983.80 is: 16,540.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.76 : 28,267.50 = 11,983.80 : x
  2. Step 2: Convert to fraction form
    20,480.76/28,267.50 = 11,983.80/x
  3. Step 3: Cross multiply
    20,480.76x = 28,267.50 × 11,983.80
  4. Step 4: Simplify right side
    20,480.76x = 338,752,066.50
  5. Step 5: Solve for x
    x = 338,752,066.50/20,480.76
  6. Step 6: Final answer
    x = 16,540.01

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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.