Home / 20,076.40-30,120.08-6,930.71

Finding the Fourth Proportional to 20,076.40, 30,120.08 and 6,930.71

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Solution

The fourth proportional to 20,076.40, 30,120.08 and 6,930.71 is: 10,397.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,076.40 : 30,120.08 = 6,930.71 : x
  2. Step 2: Convert to fraction form
    20,076.40/30,120.08 = 6,930.71/x
  3. Step 3: Cross multiply
    20,076.40x = 30,120.08 × 6,930.71
  4. Step 4: Simplify right side
    20,076.40x = 208,753,539.66
  5. Step 5: Solve for x
    x = 208,753,539.66/20,076.40
  6. Step 6: Final answer
    x = 10,397.96

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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.