Home / 21,113.67-29,147.41-12,159.44

Finding the Fourth Proportional to 21,113.67, 29,147.41 and 12,159.44

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Solution

The fourth proportional to 21,113.67, 29,147.41 and 12,159.44 is: 16,786.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.67 : 29,147.41 = 12,159.44 : x
  2. Step 2: Convert to fraction form
    21,113.67/29,147.41 = 12,159.44/x
  3. Step 3: Cross multiply
    21,113.67x = 29,147.41 × 12,159.44
  4. Step 4: Simplify right side
    21,113.67x = 354,416,183.05
  5. Step 5: Solve for x
    x = 354,416,183.05/21,113.67
  6. Step 6: Final answer
    x = 16,786.10

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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.