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Finding the Fourth Proportional to 8,004.42, 11,945.48 and 7,129.62

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Solution

The fourth proportional to 8,004.42, 11,945.48 and 7,129.62 is: 10,639.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,004.42 : 11,945.48 = 7,129.62 : x
  2. Step 2: Convert to fraction form
    8,004.42/11,945.48 = 7,129.62/x
  3. Step 3: Cross multiply
    8,004.42x = 11,945.48 × 7,129.62
  4. Step 4: Simplify right side
    8,004.42x = 85,166,697.47
  5. Step 5: Solve for x
    x = 85,166,697.47/8,004.42
  6. Step 6: Final answer
    x = 10,639.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.