Home / 20,121.36-30,171.90-6,970.20

Finding the Fourth Proportional to 20,121.36, 30,171.90 and 6,970.20

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Solution

The fourth proportional to 20,121.36, 30,171.90 and 6,970.20 is: 10,451.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.36 : 30,171.90 = 6,970.20 : x
  2. Step 2: Convert to fraction form
    20,121.36/30,171.90 = 6,970.20/x
  3. Step 3: Cross multiply
    20,121.36x = 30,171.90 × 6,970.20
  4. Step 4: Simplify right side
    20,121.36x = 210,304,177.38
  5. Step 5: Solve for x
    x = 210,304,177.38/20,121.36
  6. Step 6: Final answer
    x = 10,451.79

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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.