Home / 20,400.13-30,600.20-5,610.61

Finding the Fourth Proportional to 20,400.13, 30,600.20 and 5,610.61

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Solution

The fourth proportional to 20,400.13, 30,600.20 and 5,610.61 is: 8,415.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.13 : 30,600.20 = 5,610.61 : x
  2. Step 2: Convert to fraction form
    20,400.13/30,600.20 = 5,610.61/x
  3. Step 3: Cross multiply
    20,400.13x = 30,600.20 × 5,610.61
  4. Step 4: Simplify right side
    20,400.13x = 171,685,760.07
  5. Step 5: Solve for x
    x = 171,685,760.07/20,400.13
  6. Step 6: Final answer
    x = 8,415.92

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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.