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Finding the Fourth Proportional to 9,781.72, 14,656.02 and 6,994.24

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Solution

The fourth proportional to 9,781.72, 14,656.02 and 6,994.24 is: 10,479.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,781.72 : 14,656.02 = 6,994.24 : x
  2. Step 2: Convert to fraction form
    9,781.72/14,656.02 = 6,994.24/x
  3. Step 3: Cross multiply
    9,781.72x = 14,656.02 × 6,994.24
  4. Step 4: Simplify right side
    9,781.72x = 102,507,721.32
  5. Step 5: Solve for x
    x = 102,507,721.32/9,781.72
  6. Step 6: Final answer
    x = 10,479.52

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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.