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Finding the Fourth Proportional to 12,391.96, 17,100.95 and 6,726.72

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Solution

The fourth proportional to 12,391.96, 17,100.95 and 6,726.72 is: 9,282.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.96 : 17,100.95 = 6,726.72 : x
  2. Step 2: Convert to fraction form
    12,391.96/17,100.95 = 6,726.72/x
  3. Step 3: Cross multiply
    12,391.96x = 17,100.95 × 6,726.72
  4. Step 4: Simplify right side
    12,391.96x = 115,033,310.79
  5. Step 5: Solve for x
    x = 115,033,310.79/12,391.96
  6. Step 6: Final answer
    x = 9,282.90

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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.