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Finding the Fourth Proportional to 11,721.77, 17,570.51 and 7,329.14

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Solution

The fourth proportional to 11,721.77, 17,570.51 and 7,329.14 is: 10,986.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.77 : 17,570.51 = 7,329.14 : x
  2. Step 2: Convert to fraction form
    11,721.77/17,570.51 = 7,329.14/x
  3. Step 3: Cross multiply
    11,721.77x = 17,570.51 × 7,329.14
  4. Step 4: Simplify right side
    11,721.77x = 128,776,691.02
  5. Step 5: Solve for x
    x = 128,776,691.02/11,721.77
  6. Step 6: Final answer
    x = 10,986.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.