Home / 20,129.13-30,175.21-6,972.30

Finding the Fourth Proportional to 20,129.13, 30,175.21 and 6,972.30

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Solution

The fourth proportional to 20,129.13, 30,175.21 and 6,972.30 is: 10,452.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.13 : 30,175.21 = 6,972.30 : x
  2. Step 2: Convert to fraction form
    20,129.13/30,175.21 = 6,972.30/x
  3. Step 3: Cross multiply
    20,129.13x = 30,175.21 × 6,972.30
  4. Step 4: Simplify right side
    20,129.13x = 210,390,616.68
  5. Step 5: Solve for x
    x = 210,390,616.68/20,129.13
  6. Step 6: Final answer
    x = 10,452.05

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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.