Home / 11,319.72-16,980.36-4,739.28

Finding the Fourth Proportional to 11,319.72, 16,980.36 and 4,739.28

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Solution

The fourth proportional to 11,319.72, 16,980.36 and 4,739.28 is: 7,109.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,319.72 : 16,980.36 = 4,739.28 : x
  2. Step 2: Convert to fraction form
    11,319.72/16,980.36 = 4,739.28/x
  3. Step 3: Cross multiply
    11,319.72x = 16,980.36 × 4,739.28
  4. Step 4: Simplify right side
    11,319.72x = 80,474,680.54
  5. Step 5: Solve for x
    x = 80,474,680.54/11,319.72
  6. Step 6: Final answer
    x = 7,109.25

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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.