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Finding the Fourth Proportional to 12,381.96, 17,086.31 and 7,346.64

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Solution

The fourth proportional to 12,381.96, 17,086.31 and 7,346.64 is: 10,137.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.96 : 17,086.31 = 7,346.64 : x
  2. Step 2: Convert to fraction form
    12,381.96/17,086.31 = 7,346.64/x
  3. Step 3: Cross multiply
    12,381.96x = 17,086.31 × 7,346.64
  4. Step 4: Simplify right side
    12,381.96x = 125,526,968.50
  5. Step 5: Solve for x
    x = 125,526,968.50/12,381.96
  6. Step 6: Final answer
    x = 10,137.89

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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.