Home / 20,489.36-30,708.02-9,961.80

Finding the Fourth Proportional to 20,489.36, 30,708.02 and 9,961.80

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Solution

The fourth proportional to 20,489.36, 30,708.02 and 9,961.80 is: 14,930.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.36 : 30,708.02 = 9,961.80 : x
  2. Step 2: Convert to fraction form
    20,489.36/30,708.02 = 9,961.80/x
  3. Step 3: Cross multiply
    20,489.36x = 30,708.02 × 9,961.80
  4. Step 4: Simplify right side
    20,489.36x = 305,907,153.64
  5. Step 5: Solve for x
    x = 305,907,153.64/20,489.36
  6. Step 6: Final answer
    x = 14,930.05

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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.