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Finding the Fourth Proportional to 7,772.94, 11,649.60 and 3,878.46

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Solution

The fourth proportional to 7,772.94, 11,649.60 and 3,878.46 is: 5,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,772.94 : 11,649.60 = 3,878.46 : x
  2. Step 2: Convert to fraction form
    7,772.94/11,649.60 = 3,878.46/x
  3. Step 3: Cross multiply
    7,772.94x = 11,649.60 × 3,878.46
  4. Step 4: Simplify right side
    7,772.94x = 45,182,507.62
  5. Step 5: Solve for x
    x = 45,182,507.62/7,772.94
  6. Step 6: Final answer
    x = 5,812.80

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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.