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Finding the Fourth Proportional to 20,390.88, 30,546.48 and 14,050.80

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Solution

The fourth proportional to 20,390.88, 30,546.48 and 14,050.80 is: 21,048.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.88 : 30,546.48 = 14,050.80 : x
  2. Step 2: Convert to fraction form
    20,390.88/30,546.48 = 14,050.80/x
  3. Step 3: Cross multiply
    20,390.88x = 30,546.48 × 14,050.80
  4. Step 4: Simplify right side
    20,390.88x = 429,202,481.18
  5. Step 5: Solve for x
    x = 429,202,481.18/20,390.88
  6. Step 6: Final answer
    x = 21,048.75

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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.