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Finding the Fourth Proportional to 21,956.75, 32,935.20 and 5,316.75

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Solution

The fourth proportional to 21,956.75, 32,935.20 and 5,316.75 is: 7,975.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.75 : 32,935.20 = 5,316.75 : x
  2. Step 2: Convert to fraction form
    21,956.75/32,935.20 = 5,316.75/x
  3. Step 3: Cross multiply
    21,956.75x = 32,935.20 × 5,316.75
  4. Step 4: Simplify right side
    21,956.75x = 175,108,224.60
  5. Step 5: Solve for x
    x = 175,108,224.60/21,956.75
  6. Step 6: Final answer
    x = 7,975.14

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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.