Home / 21,672.12-32,507.88-8,515.32

Finding the Fourth Proportional to 21,672.12, 32,507.88 and 8,515.32

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Solution

The fourth proportional to 21,672.12, 32,507.88 and 8,515.32 is: 12,772.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,672.12 : 32,507.88 = 8,515.32 : x
  2. Step 2: Convert to fraction form
    21,672.12/32,507.88 = 8,515.32/x
  3. Step 3: Cross multiply
    21,672.12x = 32,507.88 × 8,515.32
  4. Step 4: Simplify right side
    21,672.12x = 276,815,000.72
  5. Step 5: Solve for x
    x = 276,815,000.72/21,672.12
  6. Step 6: Final answer
    x = 12,772.86

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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.