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Finding the Fourth Proportional to 18,954.48, 28,438.11 and 11,926.20

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Solution

The fourth proportional to 18,954.48, 28,438.11 and 11,926.20 is: 17,893.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.48 : 28,438.11 = 11,926.20 : x
  2. Step 2: Convert to fraction form
    18,954.48/28,438.11 = 11,926.20/x
  3. Step 3: Cross multiply
    18,954.48x = 28,438.11 × 11,926.20
  4. Step 4: Simplify right side
    18,954.48x = 339,158,587.48
  5. Step 5: Solve for x
    x = 339,158,587.48/18,954.48
  6. Step 6: Final answer
    x = 17,893.32

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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.