Home / 12,623.56-18,943.26-8,720.68

Finding the Fourth Proportional to 12,623.56, 18,943.26 and 8,720.68

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Solution

The fourth proportional to 12,623.56, 18,943.26 and 8,720.68 is: 13,086.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,623.56 : 18,943.26 = 8,720.68 : x
  2. Step 2: Convert to fraction form
    12,623.56/18,943.26 = 8,720.68/x
  3. Step 3: Cross multiply
    12,623.56x = 18,943.26 × 8,720.68
  4. Step 4: Simplify right side
    12,623.56x = 165,198,108.62
  5. Step 5: Solve for x
    x = 165,198,108.62/12,623.56
  6. Step 6: Final answer
    x = 13,086.49

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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.