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Finding the Fourth Proportional to 18,719.66, 28,028.82 and 11,682.84

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Solution

The fourth proportional to 18,719.66, 28,028.82 and 11,682.84 is: 17,492.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.66 : 28,028.82 = 11,682.84 : x
  2. Step 2: Convert to fraction form
    18,719.66/28,028.82 = 11,682.84/x
  3. Step 3: Cross multiply
    18,719.66x = 28,028.82 × 11,682.84
  4. Step 4: Simplify right side
    18,719.66x = 327,456,219.45
  5. Step 5: Solve for x
    x = 327,456,219.45/18,719.66
  6. Step 6: Final answer
    x = 17,492.64

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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.