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Finding the Fourth Proportional to 11,285.92, 15,559.86 and 8,629.12

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Solution

The fourth proportional to 11,285.92, 15,559.86 and 8,629.12 is: 11,896.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,285.92 : 15,559.86 = 8,629.12 : x
  2. Step 2: Convert to fraction form
    11,285.92/15,559.86 = 8,629.12/x
  3. Step 3: Cross multiply
    11,285.92x = 15,559.86 × 8,629.12
  4. Step 4: Simplify right side
    11,285.92x = 134,267,899.12
  5. Step 5: Solve for x
    x = 134,267,899.12/11,285.92
  6. Step 6: Final answer
    x = 11,896.94

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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.