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Finding the Fourth Proportional to 8,985.87, 13,457.88 and 8,674.41

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Solution

The fourth proportional to 8,985.87, 13,457.88 and 8,674.41 is: 12,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.87 : 13,457.88 = 8,674.41 : x
  2. Step 2: Convert to fraction form
    8,985.87/13,457.88 = 8,674.41/x
  3. Step 3: Cross multiply
    8,985.87x = 13,457.88 × 8,674.41
  4. Step 4: Simplify right side
    8,985.87x = 116,739,168.85
  5. Step 5: Solve for x
    x = 116,739,168.85/8,985.87
  6. Step 6: Final answer
    x = 12,991.42

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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.