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Finding the Fourth Proportional to 20,569.48, 30,850.80 and 6,718.48

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Solution

The fourth proportional to 20,569.48, 30,850.80 and 6,718.48 is: 10,076.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.48 : 30,850.80 = 6,718.48 : x
  2. Step 2: Convert to fraction form
    20,569.48/30,850.80 = 6,718.48/x
  3. Step 3: Cross multiply
    20,569.48x = 30,850.80 × 6,718.48
  4. Step 4: Simplify right side
    20,569.48x = 207,270,482.78
  5. Step 5: Solve for x
    x = 207,270,482.78/20,569.48
  6. Step 6: Final answer
    x = 10,076.60

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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.