Home / 8,619.88-12,929.88-3,938.92

Finding the Fourth Proportional to 8,619.88, 12,929.88 and 3,938.92

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Solution

The fourth proportional to 8,619.88, 12,929.88 and 3,938.92 is: 5,908.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.88 : 12,929.88 = 3,938.92 : x
  2. Step 2: Convert to fraction form
    8,619.88/12,929.88 = 3,938.92/x
  3. Step 3: Cross multiply
    8,619.88x = 12,929.88 × 3,938.92
  4. Step 4: Simplify right side
    8,619.88x = 50,929,762.93
  5. Step 5: Solve for x
    x = 50,929,762.93/8,619.88
  6. Step 6: Final answer
    x = 5,908.41

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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.