Home / 28,161.21-42,296.49-20,736.35

Finding the Fourth Proportional to 28,161.21, 42,296.49 and 20,736.35

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Solution

The fourth proportional to 28,161.21, 42,296.49 and 20,736.35 is: 31,144.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,161.21 : 42,296.49 = 20,736.35 : x
  2. Step 2: Convert to fraction form
    28,161.21/42,296.49 = 20,736.35/x
  3. Step 3: Cross multiply
    28,161.21x = 42,296.49 × 20,736.35
  4. Step 4: Simplify right side
    28,161.21x = 877,074,608.93
  5. Step 5: Solve for x
    x = 877,074,608.93/28,161.21
  6. Step 6: Final answer
    x = 31,144.78

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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.