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Finding the Fourth Proportional to 21,956.72, 32,940.32 and 7,165.67

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Solution

The fourth proportional to 21,956.72, 32,940.32 and 7,165.67 is: 10,750.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.72 : 32,940.32 = 7,165.67 : x
  2. Step 2: Convert to fraction form
    21,956.72/32,940.32 = 7,165.67/x
  3. Step 3: Cross multiply
    21,956.72x = 32,940.32 × 7,165.67
  4. Step 4: Simplify right side
    21,956.72x = 236,039,298.11
  5. Step 5: Solve for x
    x = 236,039,298.11/21,956.72
  6. Step 6: Final answer
    x = 10,750.21

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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.