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Finding the Fourth Proportional to 12,721.65, 17,556.94 and 7,058.22

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Solution

The fourth proportional to 12,721.65, 17,556.94 and 7,058.22 is: 9,740.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.65 : 17,556.94 = 7,058.22 : x
  2. Step 2: Convert to fraction form
    12,721.65/17,556.94 = 7,058.22/x
  3. Step 3: Cross multiply
    12,721.65x = 17,556.94 × 7,058.22
  4. Step 4: Simplify right side
    12,721.65x = 123,920,745.05
  5. Step 5: Solve for x
    x = 123,920,745.05/12,721.65
  6. Step 6: Final answer
    x = 9,740.93

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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.