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Finding the Fourth Proportional to 19,191, 28,788.15 and 5,340

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Solution

The fourth proportional to 19,191, 28,788.15 and 5,340 is: 8,010.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191 : 28,788.15 = 5,340 : x
  2. Step 2: Convert to fraction form
    19,191/28,788.15 = 5,340/x
  3. Step 3: Cross multiply
    19,191x = 28,788.15 × 5,340
  4. Step 4: Simplify right side
    19,191x = 153,728,721
  5. Step 5: Solve for x
    x = 153,728,721/19,191
  6. Step 6: Final answer
    x = 8,010.46

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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.