Home / 20,569.92-30,860.48-6,720

Finding the Fourth Proportional to 20,569.92, 30,860.48 and 6,720

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Solution

The fourth proportional to 20,569.92, 30,860.48 and 6,720 is: 10,081.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.92 : 30,860.48 = 6,720 : x
  2. Step 2: Convert to fraction form
    20,569.92/30,860.48 = 6,720/x
  3. Step 3: Cross multiply
    20,569.92x = 30,860.48 × 6,720
  4. Step 4: Simplify right side
    20,569.92x = 207,382,425.60
  5. Step 5: Solve for x
    x = 207,382,425.60/20,569.92
  6. Step 6: Final answer
    x = 10,081.83

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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.