Home / 20,755.20-31,084.20-14,145.60

Finding the Fourth Proportional to 20,755.20, 31,084.20 and 14,145.60

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Solution

The fourth proportional to 20,755.20, 31,084.20 and 14,145.60 is: 21,185.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.20 : 31,084.20 = 14,145.60 : x
  2. Step 2: Convert to fraction form
    20,755.20/31,084.20 = 14,145.60/x
  3. Step 3: Cross multiply
    20,755.20x = 31,084.20 × 14,145.60
  4. Step 4: Simplify right side
    20,755.20x = 439,704,659.52
  5. Step 5: Solve for x
    x = 439,704,659.52/20,755.20
  6. Step 6: Final answer
    x = 21,185.28

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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.