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Finding the Fourth Proportional to 15,036.25, 20,749.73 and 8,321.49

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Solution

The fourth proportional to 15,036.25, 20,749.73 and 8,321.49 is: 11,483.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,036.25 : 20,749.73 = 8,321.49 : x
  2. Step 2: Convert to fraction form
    15,036.25/20,749.73 = 8,321.49/x
  3. Step 3: Cross multiply
    15,036.25x = 20,749.73 × 8,321.49
  4. Step 4: Simplify right side
    15,036.25x = 172,668,670.70
  5. Step 5: Solve for x
    x = 172,668,670.70/15,036.25
  6. Step 6: Final answer
    x = 11,483.49

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.