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Finding the Fourth Proportional to 9,812.76, 14,721.98 and 2,887.24

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Solution

The fourth proportional to 9,812.76, 14,721.98 and 2,887.24 is: 4,331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,812.76 : 14,721.98 = 2,887.24 : x
  2. Step 2: Convert to fraction form
    9,812.76/14,721.98 = 2,887.24/x
  3. Step 3: Cross multiply
    9,812.76x = 14,721.98 × 2,887.24
  4. Step 4: Simplify right side
    9,812.76x = 42,505,889.54
  5. Step 5: Solve for x
    x = 42,505,889.54/9,812.76
  6. Step 6: Final answer
    x = 4,331.70

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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.