Home / 8,949.89-13,408.74-8,422.79

Finding the Fourth Proportional to 8,949.89, 13,408.74 and 8,422.79

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Solution

The fourth proportional to 8,949.89, 13,408.74 and 8,422.79 is: 12,619.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,949.89 : 13,408.74 = 8,422.79 : x
  2. Step 2: Convert to fraction form
    8,949.89/13,408.74 = 8,422.79/x
  3. Step 3: Cross multiply
    8,949.89x = 13,408.74 × 8,422.79
  4. Step 4: Simplify right side
    8,949.89x = 112,938,934.14
  5. Step 5: Solve for x
    x = 112,938,934.14/8,949.89
  6. Step 6: Final answer
    x = 12,619.03

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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.