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Finding the Fourth Proportional to 8,485.57, 12,721.74 and 4,040.95

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Solution

The fourth proportional to 8,485.57, 12,721.74 and 4,040.95 is: 6,058.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.57 : 12,721.74 = 4,040.95 : x
  2. Step 2: Convert to fraction form
    8,485.57/12,721.74 = 4,040.95/x
  3. Step 3: Cross multiply
    8,485.57x = 12,721.74 × 4,040.95
  4. Step 4: Simplify right side
    8,485.57x = 51,407,915.25
  5. Step 5: Solve for x
    x = 51,407,915.25/8,485.57
  6. Step 6: Final answer
    x = 6,058.27

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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.