Home / 21,116.25-29,137.88-12,166.67

Finding the Fourth Proportional to 21,116.25, 29,137.88 and 12,166.67

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Solution

The fourth proportional to 21,116.25, 29,137.88 and 12,166.67 is: 16,788.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.25 : 29,137.88 = 12,166.67 : x
  2. Step 2: Convert to fraction form
    21,116.25/29,137.88 = 12,166.67/x
  3. Step 3: Cross multiply
    21,116.25x = 29,137.88 × 12,166.67
  4. Step 4: Simplify right side
    21,116.25x = 354,511,073.72
  5. Step 5: Solve for x
    x = 354,511,073.72/21,116.25
  6. Step 6: Final answer
    x = 16,788.54

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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.