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Finding the Fourth Proportional to 21,903.56, 32,871.18 and 8,759.60

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Solution

The fourth proportional to 21,903.56, 32,871.18 and 8,759.60 is: 13,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,903.56 : 32,871.18 = 8,759.60 : x
  2. Step 2: Convert to fraction form
    21,903.56/32,871.18 = 8,759.60/x
  3. Step 3: Cross multiply
    21,903.56x = 32,871.18 × 8,759.60
  4. Step 4: Simplify right side
    21,903.56x = 287,938,388.33
  5. Step 5: Solve for x
    x = 287,938,388.33/21,903.56
  6. Step 6: Final answer
    x = 13,145.73

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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.