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Finding the Fourth Proportional to 15,036.54, 20,749.79 and 8,321.54

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Solution

The fourth proportional to 15,036.54, 20,749.79 and 8,321.54 is: 11,483.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,036.54 : 20,749.79 = 8,321.54 : x
  2. Step 2: Convert to fraction form
    15,036.54/20,749.79 = 8,321.54/x
  3. Step 3: Cross multiply
    15,036.54x = 20,749.79 × 8,321.54
  4. Step 4: Simplify right side
    15,036.54x = 172,670,280.15
  5. Step 5: Solve for x
    x = 172,670,280.15/15,036.54
  6. Step 6: Final answer
    x = 11,483.38

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1.5x scale

Why These Related Problems?

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