Home / 13,720.86-20,559.42-8,786.46

Finding the Fourth Proportional to 13,720.86, 20,559.42 and 8,786.46

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Solution

The fourth proportional to 13,720.86, 20,559.42 and 8,786.46 is: 13,165.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.86 : 20,559.42 = 8,786.46 : x
  2. Step 2: Convert to fraction form
    13,720.86/20,559.42 = 8,786.46/x
  3. Step 3: Cross multiply
    13,720.86x = 20,559.42 × 8,786.46
  4. Step 4: Simplify right side
    13,720.86x = 180,644,521.45
  5. Step 5: Solve for x
    x = 180,644,521.45/13,720.86
  6. Step 6: Final answer
    x = 13,165.69

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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.