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Finding the Fourth Proportional to 11,893.77, 17,840.86 and 3,128.36

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Solution

The fourth proportional to 11,893.77, 17,840.86 and 3,128.36 is: 4,692.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,893.77 : 17,840.86 = 3,128.36 : x
  2. Step 2: Convert to fraction form
    11,893.77/17,840.86 = 3,128.36/x
  3. Step 3: Cross multiply
    11,893.77x = 17,840.86 × 3,128.36
  4. Step 4: Simplify right side
    11,893.77x = 55,812,535.76
  5. Step 5: Solve for x
    x = 55,812,535.76/11,893.77
  6. Step 6: Final answer
    x = 4,692.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.