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Finding the Fourth Proportional to 9,977.20, 14,963.70 and 5,042.20

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Solution

The fourth proportional to 9,977.20, 14,963.70 and 5,042.20 is: 7,562.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,977.20 : 14,963.70 = 5,042.20 : x
  2. Step 2: Convert to fraction form
    9,977.20/14,963.70 = 5,042.20/x
  3. Step 3: Cross multiply
    9,977.20x = 14,963.70 × 5,042.20
  4. Step 4: Simplify right side
    9,977.20x = 75,449,968.14
  5. Step 5: Solve for x
    x = 75,449,968.14/9,977.20
  6. Step 6: Final answer
    x = 7,562.24

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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.