Home / 20,561.54-30,842.30-11,777.68

Finding the Fourth Proportional to 20,561.54, 30,842.30 and 11,777.68

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Solution

The fourth proportional to 20,561.54, 30,842.30 and 11,777.68 is: 17,666.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.54 : 30,842.30 = 11,777.68 : x
  2. Step 2: Convert to fraction form
    20,561.54/30,842.30 = 11,777.68/x
  3. Step 3: Cross multiply
    20,561.54x = 30,842.30 × 11,777.68
  4. Step 4: Simplify right side
    20,561.54x = 363,250,739.86
  5. Step 5: Solve for x
    x = 363,250,739.86/20,561.54
  6. Step 6: Final answer
    x = 17,666.51

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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.