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Finding the Fourth Proportional to 9,905.58, 13,662.15 and 6,321.63

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Solution

The fourth proportional to 9,905.58, 13,662.15 and 6,321.63 is: 8,719.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.58 : 13,662.15 = 6,321.63 : x
  2. Step 2: Convert to fraction form
    9,905.58/13,662.15 = 6,321.63/x
  3. Step 3: Cross multiply
    9,905.58x = 13,662.15 × 6,321.63
  4. Step 4: Simplify right side
    9,905.58x = 86,367,057.30
  5. Step 5: Solve for x
    x = 86,367,057.30/9,905.58
  6. Step 6: Final answer
    x = 8,719.03

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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.