Home / 20,561.92-30,840-6,711.04

Finding the Fourth Proportional to 20,561.92, 30,840 and 6,711.04

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Solution

The fourth proportional to 20,561.92, 30,840 and 6,711.04 is: 10,065.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.92 : 30,840 = 6,711.04 : x
  2. Step 2: Convert to fraction form
    20,561.92/30,840 = 6,711.04/x
  3. Step 3: Cross multiply
    20,561.92x = 30,840 × 6,711.04
  4. Step 4: Simplify right side
    20,561.92x = 206,968,473.60
  5. Step 5: Solve for x
    x = 206,968,473.60/20,561.92
  6. Step 6: Final answer
    x = 10,065.62

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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.