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Finding the Fourth Proportional to 18,997.84, 28,496.76 and 12,051.28

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Solution

The fourth proportional to 18,997.84, 28,496.76 and 12,051.28 is: 18,076.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.84 : 28,496.76 = 12,051.28 : x
  2. Step 2: Convert to fraction form
    18,997.84/28,496.76 = 12,051.28/x
  3. Step 3: Cross multiply
    18,997.84x = 28,496.76 × 12,051.28
  4. Step 4: Simplify right side
    18,997.84x = 343,422,433.85
  5. Step 5: Solve for x
    x = 343,422,433.85/18,997.84
  6. Step 6: Final answer
    x = 18,076.92

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Similar ratio
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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.