Home / 20,121.70-30,186.60-6,971.35

Finding the Fourth Proportional to 20,121.70, 30,186.60 and 6,971.35

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Solution

The fourth proportional to 20,121.70, 30,186.60 and 6,971.35 is: 10,458.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.70 : 30,186.60 = 6,971.35 : x
  2. Step 2: Convert to fraction form
    20,121.70/30,186.60 = 6,971.35/x
  3. Step 3: Cross multiply
    20,121.70x = 30,186.60 × 6,971.35
  4. Step 4: Simplify right side
    20,121.70x = 210,441,353.91
  5. Step 5: Solve for x
    x = 210,441,353.91/20,121.70
  6. Step 6: Final answer
    x = 10,458.43

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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.