Home / 21,135.35-31,675.44-18,900.96

Finding the Fourth Proportional to 21,135.35, 31,675.44 and 18,900.96

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Solution

The fourth proportional to 21,135.35, 31,675.44 and 18,900.96 is: 28,326.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.35 : 31,675.44 = 18,900.96 : x
  2. Step 2: Convert to fraction form
    21,135.35/31,675.44 = 18,900.96/x
  3. Step 3: Cross multiply
    21,135.35x = 31,675.44 × 18,900.96
  4. Step 4: Simplify right side
    21,135.35x = 598,696,224.42
  5. Step 5: Solve for x
    x = 598,696,224.42/21,135.35
  6. Step 6: Final answer
    x = 28,326.78

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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.