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Finding the Fourth Proportional to 12,779.44, 17,638.11 and 7,190.44

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Solution

The fourth proportional to 12,779.44, 17,638.11 and 7,190.44 is: 9,924.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.44 : 17,638.11 = 7,190.44 : x
  2. Step 2: Convert to fraction form
    12,779.44/17,638.11 = 7,190.44/x
  3. Step 3: Cross multiply
    12,779.44x = 17,638.11 × 7,190.44
  4. Step 4: Simplify right side
    12,779.44x = 126,825,771.67
  5. Step 5: Solve for x
    x = 126,825,771.67/12,779.44
  6. Step 6: Final answer
    x = 9,924.20

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1.5x scale

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.