Home / 20,910.15-31,365.23-18,796.05

Finding the Fourth Proportional to 20,910.15, 31,365.23 and 18,796.05

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Solution

The fourth proportional to 20,910.15, 31,365.23 and 18,796.05 is: 28,194.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.15 : 31,365.23 = 18,796.05 : x
  2. Step 2: Convert to fraction form
    20,910.15/31,365.23 = 18,796.05/x
  3. Step 3: Cross multiply
    20,910.15x = 31,365.23 × 18,796.05
  4. Step 4: Simplify right side
    20,910.15x = 589,542,337.36
  5. Step 5: Solve for x
    x = 589,542,337.36/20,910.15
  6. Step 6: Final answer
    x = 28,194.08

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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.