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Finding the Fourth Proportional to 12,321.93, 16,986.56 and 8,778.99

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Solution

The fourth proportional to 12,321.93, 16,986.56 and 8,778.99 is: 12,102.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.93 : 16,986.56 = 8,778.99 : x
  2. Step 2: Convert to fraction form
    12,321.93/16,986.56 = 8,778.99/x
  3. Step 3: Cross multiply
    12,321.93x = 16,986.56 × 8,778.99
  4. Step 4: Simplify right side
    12,321.93x = 149,124,862.32
  5. Step 5: Solve for x
    x = 149,124,862.32/12,321.93
  6. Step 6: Final answer
    x = 12,102.39

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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.