Home / 13,721.08-18,928.20-9,003.64

Finding the Fourth Proportional to 13,721.08, 18,928.20 and 9,003.64

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Solution

The fourth proportional to 13,721.08, 18,928.20 and 9,003.64 is: 12,420.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.08 : 18,928.20 = 9,003.64 : x
  2. Step 2: Convert to fraction form
    13,721.08/18,928.20 = 9,003.64/x
  3. Step 3: Cross multiply
    13,721.08x = 18,928.20 × 9,003.64
  4. Step 4: Simplify right side
    13,721.08x = 170,422,698.65
  5. Step 5: Solve for x
    x = 170,422,698.65/13,721.08
  6. Step 6: Final answer
    x = 12,420.50

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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.