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Finding the Fourth Proportional to 19,290.12, 28,912.03 and 9,934.54

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Solution

The fourth proportional to 19,290.12, 28,912.03 and 9,934.54 is: 14,889.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,290.12 : 28,912.03 = 9,934.54 : x
  2. Step 2: Convert to fraction form
    19,290.12/28,912.03 = 9,934.54/x
  3. Step 3: Cross multiply
    19,290.12x = 28,912.03 × 9,934.54
  4. Step 4: Simplify right side
    19,290.12x = 287,227,718.52
  5. Step 5: Solve for x
    x = 287,227,718.52/19,290.12
  6. Step 6: Final answer
    x = 14,889.89

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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.