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Finding the Fourth Proportional to 6,800.40, 10,200.60 and 5,160.15

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Solution

The fourth proportional to 6,800.40, 10,200.60 and 5,160.15 is: 7,740.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,800.40 : 10,200.60 = 5,160.15 : x
  2. Step 2: Convert to fraction form
    6,800.40/10,200.60 = 5,160.15/x
  3. Step 3: Cross multiply
    6,800.40x = 10,200.60 × 5,160.15
  4. Step 4: Simplify right side
    6,800.40x = 52,636,626.09
  5. Step 5: Solve for x
    x = 52,636,626.09/6,800.40
  6. Step 6: Final answer
    x = 7,740.23

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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.