Home / 8,638.22-11,920.09-5,100.75

Finding the Fourth Proportional to 8,638.22, 11,920.09 and 5,100.75

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Solution

The fourth proportional to 8,638.22, 11,920.09 and 5,100.75 is: 7,038.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.22 : 11,920.09 = 5,100.75 : x
  2. Step 2: Convert to fraction form
    8,638.22/11,920.09 = 5,100.75/x
  3. Step 3: Cross multiply
    8,638.22x = 11,920.09 × 5,100.75
  4. Step 4: Simplify right side
    8,638.22x = 60,801,399.07
  5. Step 5: Solve for x
    x = 60,801,399.07/8,638.22
  6. Step 6: Final answer
    x = 7,038.65

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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.