Home / 20,765.70-31,051.35-15,516.90

Finding the Fourth Proportional to 20,765.70, 31,051.35 and 15,516.90

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Solution

The fourth proportional to 20,765.70, 31,051.35 and 15,516.90 is: 23,202.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.70 : 31,051.35 = 15,516.90 : x
  2. Step 2: Convert to fraction form
    20,765.70/31,051.35 = 15,516.90/x
  3. Step 3: Cross multiply
    20,765.70x = 31,051.35 × 15,516.90
  4. Step 4: Simplify right side
    20,765.70x = 481,820,692.82
  5. Step 5: Solve for x
    x = 481,820,692.82/20,765.70
  6. Step 6: Final answer
    x = 23,202.72

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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.