Home / 20,777.60-31,144.80-11,403.20

Finding the Fourth Proportional to 20,777.60, 31,144.80 and 11,403.20

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Solution

The fourth proportional to 20,777.60, 31,144.80 and 11,403.20 is: 17,092.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.60 : 31,144.80 = 11,403.20 : x
  2. Step 2: Convert to fraction form
    20,777.60/31,144.80 = 11,403.20/x
  3. Step 3: Cross multiply
    20,777.60x = 31,144.80 × 11,403.20
  4. Step 4: Simplify right side
    20,777.60x = 355,150,383.36
  5. Step 5: Solve for x
    x = 355,150,383.36/20,777.60
  6. Step 6: Final answer
    x = 17,092.95

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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.