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Finding the Fourth Proportional to 8,721.70, 13,074.84 and 3,174.07

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Solution

The fourth proportional to 8,721.70, 13,074.84 and 3,174.07 is: 4,758.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.70 : 13,074.84 = 3,174.07 : x
  2. Step 2: Convert to fraction form
    8,721.70/13,074.84 = 3,174.07/x
  3. Step 3: Cross multiply
    8,721.70x = 13,074.84 × 3,174.07
  4. Step 4: Simplify right side
    8,721.70x = 41,500,457.40
  5. Step 5: Solve for x
    x = 41,500,457.40/8,721.70
  6. Step 6: Final answer
    x = 4,758.30

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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.