Home / 21,709.80-32,540.40-12,354.30

Finding the Fourth Proportional to 21,709.80, 32,540.40 and 12,354.30

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Solution

The fourth proportional to 21,709.80, 32,540.40 and 12,354.30 is: 18,517.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709.80 : 32,540.40 = 12,354.30 : x
  2. Step 2: Convert to fraction form
    21,709.80/32,540.40 = 12,354.30/x
  3. Step 3: Cross multiply
    21,709.80x = 32,540.40 × 12,354.30
  4. Step 4: Simplify right side
    21,709.80x = 402,013,863.72
  5. Step 5: Solve for x
    x = 402,013,863.72/21,709.80
  6. Step 6: Final answer
    x = 18,517.62

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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.