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Finding the Fourth Proportional to 6,480.09, 9,720.09 and 2,779.92

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Solution

The fourth proportional to 6,480.09, 9,720.09 and 2,779.92 is: 4,169.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,480.09 : 9,720.09 = 2,779.92 : x
  2. Step 2: Convert to fraction form
    6,480.09/9,720.09 = 2,779.92/x
  3. Step 3: Cross multiply
    6,480.09x = 9,720.09 × 2,779.92
  4. Step 4: Simplify right side
    6,480.09x = 27,021,072.59
  5. Step 5: Solve for x
    x = 27,021,072.59/6,480.09
  6. Step 6: Final answer
    x = 4,169.86

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1.5x scale

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.