Home / 20,109.20-30,175.56-8,421.44

Finding the Fourth Proportional to 20,109.20, 30,175.56 and 8,421.44

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Solution

The fourth proportional to 20,109.20, 30,175.56 and 8,421.44 is: 12,637.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.20 : 30,175.56 = 8,421.44 : x
  2. Step 2: Convert to fraction form
    20,109.20/30,175.56 = 8,421.44/x
  3. Step 3: Cross multiply
    20,109.20x = 30,175.56 × 8,421.44
  4. Step 4: Simplify right side
    20,109.20x = 254,121,668.01
  5. Step 5: Solve for x
    x = 254,121,668.01/20,109.20
  6. Step 6: Final answer
    x = 12,637.08

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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.