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Finding the Fourth Proportional to 11,169.60, 15,412.56 and 6,921.60

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Solution

The fourth proportional to 11,169.60, 15,412.56 and 6,921.60 is: 9,550.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,169.60 : 15,412.56 = 6,921.60 : x
  2. Step 2: Convert to fraction form
    11,169.60/15,412.56 = 6,921.60/x
  3. Step 3: Cross multiply
    11,169.60x = 15,412.56 × 6,921.60
  4. Step 4: Simplify right side
    11,169.60x = 106,679,575.30
  5. Step 5: Solve for x
    x = 106,679,575.30/11,169.60
  6. Step 6: Final answer
    x = 9,550.89

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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.