Home / 12,647.31-18,966.87-4,211.57

Finding the Fourth Proportional to 12,647.31, 18,966.87 and 4,211.57

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Solution

The fourth proportional to 12,647.31, 18,966.87 and 4,211.57 is: 6,315.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.31 : 18,966.87 = 4,211.57 : x
  2. Step 2: Convert to fraction form
    12,647.31/18,966.87 = 4,211.57/x
  3. Step 3: Cross multiply
    12,647.31x = 18,966.87 × 4,211.57
  4. Step 4: Simplify right side
    12,647.31x = 79,880,205.85
  5. Step 5: Solve for x
    x = 79,880,205.85/12,647.31
  6. Step 6: Final answer
    x = 6,315.98

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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.