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Finding the Fourth Proportional to 20,803.16, 31,204.74 and 6,952.16

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Solution

The fourth proportional to 20,803.16, 31,204.74 and 6,952.16 is: 10,428.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.16 : 31,204.74 = 6,952.16 : x
  2. Step 2: Convert to fraction form
    20,803.16/31,204.74 = 6,952.16/x
  3. Step 3: Cross multiply
    20,803.16x = 31,204.74 × 6,952.16
  4. Step 4: Simplify right side
    20,803.16x = 216,940,154.45
  5. Step 5: Solve for x
    x = 216,940,154.45/20,803.16
  6. Step 6: Final answer
    x = 10,428.23

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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.