Home / 13,119.02-19,676.10-8,431.56

Finding the Fourth Proportional to 13,119.02, 19,676.10 and 8,431.56

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Solution

The fourth proportional to 13,119.02, 19,676.10 and 8,431.56 is: 12,645.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.02 : 19,676.10 = 8,431.56 : x
  2. Step 2: Convert to fraction form
    13,119.02/19,676.10 = 8,431.56/x
  3. Step 3: Cross multiply
    13,119.02x = 19,676.10 × 8,431.56
  4. Step 4: Simplify right side
    13,119.02x = 165,900,217.72
  5. Step 5: Solve for x
    x = 165,900,217.72/13,119.02
  6. Step 6: Final answer
    x = 12,645.78

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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.