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Finding the Fourth Proportional to 12,992.92, 19,495.14 and 4,783

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Solution

The fourth proportional to 12,992.92, 19,495.14 and 4,783 is: 7,176.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,992.92 : 19,495.14 = 4,783 : x
  2. Step 2: Convert to fraction form
    12,992.92/19,495.14 = 4,783/x
  3. Step 3: Cross multiply
    12,992.92x = 19,495.14 × 4,783
  4. Step 4: Simplify right side
    12,992.92x = 93,245,254.62
  5. Step 5: Solve for x
    x = 93,245,254.62/12,992.92
  6. Step 6: Final answer
    x = 7,176.62

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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.