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Finding the Fourth Proportional to 12,721.35, 17,556.35 and 7,056.64

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Solution

The fourth proportional to 12,721.35, 17,556.35 and 7,056.64 is: 9,738.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.35 : 17,556.35 = 7,056.64 : x
  2. Step 2: Convert to fraction form
    12,721.35/17,556.35 = 7,056.64/x
  3. Step 3: Cross multiply
    12,721.35x = 17,556.35 × 7,056.64
  4. Step 4: Simplify right side
    12,721.35x = 123,888,841.66
  5. Step 5: Solve for x
    x = 123,888,841.66/12,721.35
  6. Step 6: Final answer
    x = 9,738.66

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.