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Finding the Fourth Proportional to 8,485.43, 11,710.44 and 5,128.11

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Solution

The fourth proportional to 8,485.43, 11,710.44 and 5,128.11 is: 7,077.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.43 : 11,710.44 = 5,128.11 : x
  2. Step 2: Convert to fraction form
    8,485.43/11,710.44 = 5,128.11/x
  3. Step 3: Cross multiply
    8,485.43x = 11,710.44 × 5,128.11
  4. Step 4: Simplify right side
    8,485.43x = 60,052,424.47
  5. Step 5: Solve for x
    x = 60,052,424.47/8,485.43
  6. Step 6: Final answer
    x = 7,077.13

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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.