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Finding the Fourth Proportional to 12,391.64, 17,099.88 and 6,726.26

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Solution

The fourth proportional to 12,391.64, 17,099.88 and 6,726.26 is: 9,281.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.64 : 17,099.88 = 6,726.26 : x
  2. Step 2: Convert to fraction form
    12,391.64/17,099.88 = 6,726.26/x
  3. Step 3: Cross multiply
    12,391.64x = 17,099.88 × 6,726.26
  4. Step 4: Simplify right side
    12,391.64x = 115,018,238.85
  5. Step 5: Solve for x
    x = 115,018,238.85/12,391.64
  6. Step 6: Final answer
    x = 9,281.92

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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.