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Finding the Fourth Proportional to 19,295.98, 28,992.40 and 12,279.04

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Solution

The fourth proportional to 19,295.98, 28,992.40 and 12,279.04 is: 18,449.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,295.98 : 28,992.40 = 12,279.04 : x
  2. Step 2: Convert to fraction form
    19,295.98/28,992.40 = 12,279.04/x
  3. Step 3: Cross multiply
    19,295.98x = 28,992.40 × 12,279.04
  4. Step 4: Simplify right side
    19,295.98x = 355,998,736.12
  5. Step 5: Solve for x
    x = 355,998,736.12/19,295.98
  6. Step 6: Final answer
    x = 18,449.38

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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.