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Finding the Fourth Proportional to 19,179, 28,768.86 and 5,328.36

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Solution

The fourth proportional to 19,179, 28,768.86 and 5,328.36 is: 7,992.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,179 : 28,768.86 = 5,328.36 : x
  2. Step 2: Convert to fraction form
    19,179/28,768.86 = 5,328.36/x
  3. Step 3: Cross multiply
    19,179x = 28,768.86 × 5,328.36
  4. Step 4: Simplify right side
    19,179x = 153,290,842.87
  5. Step 5: Solve for x
    x = 153,290,842.87/19,179
  6. Step 6: Final answer
    x = 7,992.64

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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.