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Finding the Fourth Proportional to 38,992.56, 58,481.52 and 12,698.32

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Solution

The fourth proportional to 38,992.56, 58,481.52 and 12,698.32 is: 19,045.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,992.56 : 58,481.52 = 12,698.32 : x
  2. Step 2: Convert to fraction form
    38,992.56/58,481.52 = 12,698.32/x
  3. Step 3: Cross multiply
    38,992.56x = 58,481.52 × 12,698.32
  4. Step 4: Simplify right side
    38,992.56x = 742,617,055.05
  5. Step 5: Solve for x
    x = 742,617,055.05/38,992.56
  6. Step 6: Final answer
    x = 19,045.10

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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.