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Finding the Fourth Proportional to 12,993.51, 17,920.62 and 8,743.17

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Solution

The fourth proportional to 12,993.51, 17,920.62 and 8,743.17 is: 12,058.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,993.51 : 17,920.62 = 8,743.17 : x
  2. Step 2: Convert to fraction form
    12,993.51/17,920.62 = 8,743.17/x
  3. Step 3: Cross multiply
    12,993.51x = 17,920.62 × 8,743.17
  4. Step 4: Simplify right side
    12,993.51x = 156,683,027.17
  5. Step 5: Solve for x
    x = 156,683,027.17/12,993.51
  6. Step 6: Final answer
    x = 12,058.56

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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.