Home / 6,109.90-8,431.68-3,315.40

Finding the Fourth Proportional to 6,109.90, 8,431.68 and 3,315.40

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Solution

The fourth proportional to 6,109.90, 8,431.68 and 3,315.40 is: 4,575.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,109.90 : 8,431.68 = 3,315.40 : x
  2. Step 2: Convert to fraction form
    6,109.90/8,431.68 = 3,315.40/x
  3. Step 3: Cross multiply
    6,109.90x = 8,431.68 × 3,315.40
  4. Step 4: Simplify right side
    6,109.90x = 27,954,391.87
  5. Step 5: Solve for x
    x = 27,954,391.87/6,109.90
  6. Step 6: Final answer
    x = 4,575.26

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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.