Home / 8,621.48-12,936.64-3,689.80

Finding the Fourth Proportional to 8,621.48, 12,936.64 and 3,689.80

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Solution

The fourth proportional to 8,621.48, 12,936.64 and 3,689.80 is: 5,536.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.48 : 12,936.64 = 3,689.80 : x
  2. Step 2: Convert to fraction form
    8,621.48/12,936.64 = 3,689.80/x
  3. Step 3: Cross multiply
    8,621.48x = 12,936.64 × 3,689.80
  4. Step 4: Simplify right side
    8,621.48x = 47,733,614.27
  5. Step 5: Solve for x
    x = 47,733,614.27/8,621.48
  6. Step 6: Final answer
    x = 5,536.59

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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.