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Finding the Fourth Proportional to 21,871.56, 32,812.55 and 7,080.48

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Solution

The fourth proportional to 21,871.56, 32,812.55 and 7,080.48 is: 10,622.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.56 : 32,812.55 = 7,080.48 : x
  2. Step 2: Convert to fraction form
    21,871.56/32,812.55 = 7,080.48/x
  3. Step 3: Cross multiply
    21,871.56x = 32,812.55 × 7,080.48
  4. Step 4: Simplify right side
    21,871.56x = 232,328,568.62
  5. Step 5: Solve for x
    x = 232,328,568.62/21,871.56
  6. Step 6: Final answer
    x = 10,622.41

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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.