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Finding the Fourth Proportional to 17,956.66, 26,918.36 and 9,172.20

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Solution

The fourth proportional to 17,956.66, 26,918.36 and 9,172.20 is: 13,749.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,956.66 : 26,918.36 = 9,172.20 : x
  2. Step 2: Convert to fraction form
    17,956.66/26,918.36 = 9,172.20/x
  3. Step 3: Cross multiply
    17,956.66x = 26,918.36 × 9,172.20
  4. Step 4: Simplify right side
    17,956.66x = 246,900,581.59
  5. Step 5: Solve for x
    x = 246,900,581.59/17,956.66
  6. Step 6: Final answer
    x = 13,749.81

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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.