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Finding the Fourth Proportional to 21,955.46, 32,936.63 and 7,160.96

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Solution

The fourth proportional to 21,955.46, 32,936.63 and 7,160.96 is: 10,742.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.46 : 32,936.63 = 7,160.96 : x
  2. Step 2: Convert to fraction form
    21,955.46/32,936.63 = 7,160.96/x
  3. Step 3: Cross multiply
    21,955.46x = 32,936.63 × 7,160.96
  4. Step 4: Simplify right side
    21,955.46x = 235,857,751.23
  5. Step 5: Solve for x
    x = 235,857,751.23/21,955.46
  6. Step 6: Final answer
    x = 10,742.56

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1.5x scale

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.