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Finding the Fourth Proportional to 12,415.81, 18,623.88 and 6,879.96

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Solution

The fourth proportional to 12,415.81, 18,623.88 and 6,879.96 is: 10,320.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.81 : 18,623.88 = 6,879.96 : x
  2. Step 2: Convert to fraction form
    12,415.81/18,623.88 = 6,879.96/x
  3. Step 3: Cross multiply
    12,415.81x = 18,623.88 × 6,879.96
  4. Step 4: Simplify right side
    12,415.81x = 128,131,549.44
  5. Step 5: Solve for x
    x = 128,131,549.44/12,415.81
  6. Step 6: Final answer
    x = 10,320.03

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1.5x scale

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.