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Finding the Fourth Proportional to 12,755.84, 17,604.26 and 7,721.31

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Solution

The fourth proportional to 12,755.84, 17,604.26 and 7,721.31 is: 10,656.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.84 : 17,604.26 = 7,721.31 : x
  2. Step 2: Convert to fraction form
    12,755.84/17,604.26 = 7,721.31/x
  3. Step 3: Cross multiply
    12,755.84x = 17,604.26 × 7,721.31
  4. Step 4: Simplify right side
    12,755.84x = 135,927,910.17
  5. Step 5: Solve for x
    x = 135,927,910.17/12,755.84
  6. Step 6: Final answer
    x = 10,656.14

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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.