Home / 8,211.09-12,307.80-3,985.41

Finding the Fourth Proportional to 8,211.09, 12,307.80 and 3,985.41

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Solution

The fourth proportional to 8,211.09, 12,307.80 and 3,985.41 is: 5,973.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211.09 : 12,307.80 = 3,985.41 : x
  2. Step 2: Convert to fraction form
    8,211.09/12,307.80 = 3,985.41/x
  3. Step 3: Cross multiply
    8,211.09x = 12,307.80 × 3,985.41
  4. Step 4: Simplify right side
    8,211.09x = 49,051,629.20
  5. Step 5: Solve for x
    x = 49,051,629.20/8,211.09
  6. Step 6: Final answer
    x = 5,973.83

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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.