Home / 20,809.97-31,200.37-7,660.63

Finding the Fourth Proportional to 20,809.97, 31,200.37 and 7,660.63

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Solution

The fourth proportional to 20,809.97, 31,200.37 and 7,660.63 is: 11,485.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.97 : 31,200.37 = 7,660.63 : x
  2. Step 2: Convert to fraction form
    20,809.97/31,200.37 = 7,660.63/x
  3. Step 3: Cross multiply
    20,809.97x = 31,200.37 × 7,660.63
  4. Step 4: Simplify right side
    20,809.97x = 239,014,452.13
  5. Step 5: Solve for x
    x = 239,014,452.13/20,809.97
  6. Step 6: Final answer
    x = 11,485.58

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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.