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Finding the Fourth Proportional to 8,739.54, 11,992.73 and 7,947.54

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Solution

The fourth proportional to 8,739.54, 11,992.73 and 7,947.54 is: 10,905.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.54 : 11,992.73 = 7,947.54 : x
  2. Step 2: Convert to fraction form
    8,739.54/11,992.73 = 7,947.54/x
  3. Step 3: Cross multiply
    8,739.54x = 11,992.73 × 7,947.54
  4. Step 4: Simplify right side
    8,739.54x = 95,312,701.38
  5. Step 5: Solve for x
    x = 95,312,701.38/8,739.54
  6. Step 6: Final answer
    x = 10,905.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.