Home / 20,165.40-30,236.28-6,121.20

Finding the Fourth Proportional to 20,165.40, 30,236.28 and 6,121.20

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Solution

The fourth proportional to 20,165.40, 30,236.28 and 6,121.20 is: 9,178.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,165.40 : 30,236.28 = 6,121.20 : x
  2. Step 2: Convert to fraction form
    20,165.40/30,236.28 = 6,121.20/x
  3. Step 3: Cross multiply
    20,165.40x = 30,236.28 × 6,121.20
  4. Step 4: Simplify right side
    20,165.40x = 185,082,317.14
  5. Step 5: Solve for x
    x = 185,082,317.14/20,165.40
  6. Step 6: Final answer
    x = 9,178.21

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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.