Home / 12,435.62-17,155.71-8,181.21

Finding the Fourth Proportional to 12,435.62, 17,155.71 and 8,181.21

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Solution

The fourth proportional to 12,435.62, 17,155.71 and 8,181.21 is: 11,286.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,435.62 : 17,155.71 = 8,181.21 : x
  2. Step 2: Convert to fraction form
    12,435.62/17,155.71 = 8,181.21/x
  3. Step 3: Cross multiply
    12,435.62x = 17,155.71 × 8,181.21
  4. Step 4: Simplify right side
    12,435.62x = 140,354,466.21
  5. Step 5: Solve for x
    x = 140,354,466.21/12,435.62
  6. Step 6: Final answer
    x = 11,286.48

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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.