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Finding the Fourth Proportional to 7,737.76, 10,678.04 and 4,200.80

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Solution

The fourth proportional to 7,737.76, 10,678.04 and 4,200.80 is: 5,797.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,737.76 : 10,678.04 = 4,200.80 : x
  2. Step 2: Convert to fraction form
    7,737.76/10,678.04 = 4,200.80/x
  3. Step 3: Cross multiply
    7,737.76x = 10,678.04 × 4,200.80
  4. Step 4: Simplify right side
    7,737.76x = 44,856,310.43
  5. Step 5: Solve for x
    x = 44,856,310.43/7,737.76
  6. Step 6: Final answer
    x = 5,797.07

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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.