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Finding the Fourth Proportional to 17,817.18, 26,717.54 and 7,956.51

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Solution

The fourth proportional to 17,817.18, 26,717.54 and 7,956.51 is: 11,931.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,817.18 : 26,717.54 = 7,956.51 : x
  2. Step 2: Convert to fraction form
    17,817.18/26,717.54 = 7,956.51/x
  3. Step 3: Cross multiply
    17,817.18x = 26,717.54 × 7,956.51
  4. Step 4: Simplify right side
    17,817.18x = 212,578,334.40
  5. Step 5: Solve for x
    x = 212,578,334.40/17,817.18
  6. Step 6: Final answer
    x = 11,931.09

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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.