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Finding the Fourth Proportional to 8,674.70, 13,010.11 and 3,990.21

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Solution

The fourth proportional to 8,674.70, 13,010.11 and 3,990.21 is: 5,984.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,674.70 : 13,010.11 = 3,990.21 : x
  2. Step 2: Convert to fraction form
    8,674.70/13,010.11 = 3,990.21/x
  3. Step 3: Cross multiply
    8,674.70x = 13,010.11 × 3,990.21
  4. Step 4: Simplify right side
    8,674.70x = 51,913,097.76
  5. Step 5: Solve for x
    x = 51,913,097.76/8,674.70
  6. Step 6: Final answer
    x = 5,984.42

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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.