Home / 8,638.12-11,920.80-5,100.04

Finding the Fourth Proportional to 8,638.12, 11,920.80 and 5,100.04

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Solution

The fourth proportional to 8,638.12, 11,920.80 and 5,100.04 is: 7,038.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.12 : 11,920.80 = 5,100.04 : x
  2. Step 2: Convert to fraction form
    8,638.12/11,920.80 = 5,100.04/x
  3. Step 3: Cross multiply
    8,638.12x = 11,920.80 × 5,100.04
  4. Step 4: Simplify right side
    8,638.12x = 60,796,556.83
  5. Step 5: Solve for x
    x = 60,796,556.83/8,638.12
  6. Step 6: Final answer
    x = 7,038.17

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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.