Home / 12,679.22-19,013.96-8,771.78

Finding the Fourth Proportional to 12,679.22, 19,013.96 and 8,771.78

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Solution

The fourth proportional to 12,679.22, 19,013.96 and 8,771.78 is: 13,154.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.22 : 19,013.96 = 8,771.78 : x
  2. Step 2: Convert to fraction form
    12,679.22/19,013.96 = 8,771.78/x
  3. Step 3: Cross multiply
    12,679.22x = 19,013.96 × 8,771.78
  4. Step 4: Simplify right side
    12,679.22x = 166,786,274.05
  5. Step 5: Solve for x
    x = 166,786,274.05/12,679.22
  6. Step 6: Final answer
    x = 13,154.30

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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.