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Finding the Fourth Proportional to 11,768.40, 17,643.60 and 5,929.20

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Solution

The fourth proportional to 11,768.40, 17,643.60 and 5,929.20 is: 8,889.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,768.40 : 17,643.60 = 5,929.20 : x
  2. Step 2: Convert to fraction form
    11,768.40/17,643.60 = 5,929.20/x
  3. Step 3: Cross multiply
    11,768.40x = 17,643.60 × 5,929.20
  4. Step 4: Simplify right side
    11,768.40x = 104,612,433.12
  5. Step 5: Solve for x
    x = 104,612,433.12/11,768.40
  6. Step 6: Final answer
    x = 8,889.27

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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.