Home / 13,423.86-18,521.97-8,118.56

Finding the Fourth Proportional to 13,423.86, 18,521.97 and 8,118.56

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Solution

The fourth proportional to 13,423.86, 18,521.97 and 8,118.56 is: 11,201.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.86 : 18,521.97 = 8,118.56 : x
  2. Step 2: Convert to fraction form
    13,423.86/18,521.97 = 8,118.56/x
  3. Step 3: Cross multiply
    13,423.86x = 18,521.97 × 8,118.56
  4. Step 4: Simplify right side
    13,423.86x = 150,371,740.62
  5. Step 5: Solve for x
    x = 150,371,740.62/13,423.86
  6. Step 6: Final answer
    x = 11,201.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.