Home / 20,692.16-31,026.48-18,928.88

Finding the Fourth Proportional to 20,692.16, 31,026.48 and 18,928.88

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Solution

The fourth proportional to 20,692.16, 31,026.48 and 18,928.88 is: 28,382.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.16 : 31,026.48 = 18,928.88 : x
  2. Step 2: Convert to fraction form
    20,692.16/31,026.48 = 18,928.88/x
  3. Step 3: Cross multiply
    20,692.16x = 31,026.48 × 18,928.88
  4. Step 4: Simplify right side
    20,692.16x = 587,296,516.74
  5. Step 5: Solve for x
    x = 587,296,516.74/20,692.16
  6. Step 6: Final answer
    x = 28,382.56

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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.