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Finding the Fourth Proportional to 21,956.63, 32,940.18 and 7,165.58

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Solution

The fourth proportional to 21,956.63, 32,940.18 and 7,165.58 is: 10,750.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.63 : 32,940.18 = 7,165.58 : x
  2. Step 2: Convert to fraction form
    21,956.63/32,940.18 = 7,165.58/x
  3. Step 3: Cross multiply
    21,956.63x = 32,940.18 × 7,165.58
  4. Step 4: Simplify right side
    21,956.63x = 236,035,330.30
  5. Step 5: Solve for x
    x = 236,035,330.30/21,956.63
  6. Step 6: Final answer
    x = 10,750.07

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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.