Home / 20,851.22-31,208.49-18,908.44

Finding the Fourth Proportional to 20,851.22, 31,208.49 and 18,908.44

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Solution

The fourth proportional to 20,851.22, 31,208.49 and 18,908.44 is: 28,300.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.22 : 31,208.49 = 18,908.44 : x
  2. Step 2: Convert to fraction form
    20,851.22/31,208.49 = 18,908.44/x
  3. Step 3: Cross multiply
    20,851.22x = 31,208.49 × 18,908.44
  4. Step 4: Simplify right side
    20,851.22x = 590,103,782.63
  5. Step 5: Solve for x
    x = 590,103,782.63/20,851.22
  6. Step 6: Final answer
    x = 28,300.68

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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.