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Finding the Fourth Proportional to 8,670.94, 13,003.21 and 3,122.79

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Solution

The fourth proportional to 8,670.94, 13,003.21 and 3,122.79 is: 4,683.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,670.94 : 13,003.21 = 3,122.79 : x
  2. Step 2: Convert to fraction form
    8,670.94/13,003.21 = 3,122.79/x
  3. Step 3: Cross multiply
    8,670.94x = 13,003.21 × 3,122.79
  4. Step 4: Simplify right side
    8,670.94x = 40,606,294.16
  5. Step 5: Solve for x
    x = 40,606,294.16/8,670.94
  6. Step 6: Final answer
    x = 4,683.03

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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.