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Finding the Fourth Proportional to 20,180.40, 30,259.80 and 8,480.40

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Solution

The fourth proportional to 20,180.40, 30,259.80 and 8,480.40 is: 12,716.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,180.40 : 30,259.80 = 8,480.40 : x
  2. Step 2: Convert to fraction form
    20,180.40/30,259.80 = 8,480.40/x
  3. Step 3: Cross multiply
    20,180.40x = 30,259.80 × 8,480.40
  4. Step 4: Simplify right side
    20,180.40x = 256,615,207.92
  5. Step 5: Solve for x
    x = 256,615,207.92/20,180.40
  6. Step 6: Final answer
    x = 12,716.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.