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Finding the Fourth Proportional to 8,739.78, 12,072.43 and 6,475.71

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Solution

The fourth proportional to 8,739.78, 12,072.43 and 6,475.71 is: 8,945.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.78 : 12,072.43 = 6,475.71 : x
  2. Step 2: Convert to fraction form
    8,739.78/12,072.43 = 6,475.71/x
  3. Step 3: Cross multiply
    8,739.78x = 12,072.43 × 6,475.71
  4. Step 4: Simplify right side
    8,739.78x = 78,177,555.68
  5. Step 5: Solve for x
    x = 78,177,555.68/8,739.78
  6. Step 6: Final answer
    x = 8,945.03

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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.