Home / 21,899.40-32,857.20-8,761.20

Finding the Fourth Proportional to 21,899.40, 32,857.20 and 8,761.20

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Solution

The fourth proportional to 21,899.40, 32,857.20 and 8,761.20 is: 13,145.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.40 : 32,857.20 = 8,761.20 : x
  2. Step 2: Convert to fraction form
    21,899.40/32,857.20 = 8,761.20/x
  3. Step 3: Cross multiply
    21,899.40x = 32,857.20 × 8,761.20
  4. Step 4: Simplify right side
    21,899.40x = 287,868,500.64
  5. Step 5: Solve for x
    x = 287,868,500.64/21,899.40
  6. Step 6: Final answer
    x = 13,145.04

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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.