Home / 7,078.40-10,617.60-3,190.40

Finding the Fourth Proportional to 7,078.40, 10,617.60 and 3,190.40

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Solution

The fourth proportional to 7,078.40, 10,617.60 and 3,190.40 is: 4,785.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,078.40 : 10,617.60 = 3,190.40 : x
  2. Step 2: Convert to fraction form
    7,078.40/10,617.60 = 3,190.40/x
  3. Step 3: Cross multiply
    7,078.40x = 10,617.60 × 3,190.40
  4. Step 4: Simplify right side
    7,078.40x = 33,874,391.04
  5. Step 5: Solve for x
    x = 33,874,391.04/7,078.40
  6. Step 6: Final answer
    x = 4,785.60

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1.5x scale

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.