Home / 13,821.08-20,709.36-8,271.81

Finding the Fourth Proportional to 13,821.08, 20,709.36 and 8,271.81

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Solution

The fourth proportional to 13,821.08, 20,709.36 and 8,271.81 is: 12,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,821.08 : 20,709.36 = 8,271.81 : x
  2. Step 2: Convert to fraction form
    13,821.08/20,709.36 = 8,271.81/x
  3. Step 3: Cross multiply
    13,821.08x = 20,709.36 × 8,271.81
  4. Step 4: Simplify right side
    13,821.08x = 171,303,891.14
  5. Step 5: Solve for x
    x = 171,303,891.14/13,821.08
  6. Step 6: Final answer
    x = 12,394.40

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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.