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Finding the Fourth Proportional to 18,692.88, 28,074.96 and 15,018.72

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Solution

The fourth proportional to 18,692.88, 28,074.96 and 15,018.72 is: 22,556.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692.88 : 28,074.96 = 15,018.72 : x
  2. Step 2: Convert to fraction form
    18,692.88/28,074.96 = 15,018.72/x
  3. Step 3: Cross multiply
    18,692.88x = 28,074.96 × 15,018.72
  4. Step 4: Simplify right side
    18,692.88x = 421,649,963.25
  5. Step 5: Solve for x
    x = 421,649,963.25/18,692.88
  6. Step 6: Final answer
    x = 22,556.71

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1.5x scale

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.