Home / 20,318.72-30,470.21-6,989.19

Finding the Fourth Proportional to 20,318.72, 30,470.21 and 6,989.19

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Solution

The fourth proportional to 20,318.72, 30,470.21 and 6,989.19 is: 10,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.72 : 30,470.21 = 6,989.19 : x
  2. Step 2: Convert to fraction form
    20,318.72/30,470.21 = 6,989.19/x
  3. Step 3: Cross multiply
    20,318.72x = 30,470.21 × 6,989.19
  4. Step 4: Simplify right side
    20,318.72x = 212,961,964.03
  5. Step 5: Solve for x
    x = 212,961,964.03/20,318.72
  6. Step 6: Final answer
    x = 10,481.07

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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.