Home / 20,699.72-30,954.20-15,372.95

Finding the Fourth Proportional to 20,699.72, 30,954.20 and 15,372.95

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Solution

The fourth proportional to 20,699.72, 30,954.20 and 15,372.95 is: 22,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.72 : 30,954.20 = 15,372.95 : x
  2. Step 2: Convert to fraction form
    20,699.72/30,954.20 = 15,372.95/x
  3. Step 3: Cross multiply
    20,699.72x = 30,954.20 × 15,372.95
  4. Step 4: Simplify right side
    20,699.72x = 475,857,369.41
  5. Step 5: Solve for x
    x = 475,857,369.41/20,699.72
  6. Step 6: Final answer
    x = 22,988.60

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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.