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Finding the Fourth Proportional to 18,992.63, 28,488.96 and 5,141.63

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Solution

The fourth proportional to 18,992.63, 28,488.96 and 5,141.63 is: 7,712.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.63 : 28,488.96 = 5,141.63 : x
  2. Step 2: Convert to fraction form
    18,992.63/28,488.96 = 5,141.63/x
  3. Step 3: Cross multiply
    18,992.63x = 28,488.96 × 5,141.63
  4. Step 4: Simplify right side
    18,992.63x = 146,479,548.96
  5. Step 5: Solve for x
    x = 146,479,548.96/18,992.63
  6. Step 6: Final answer
    x = 7,712.44

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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.