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Finding the Fourth Proportional to 6,750.78, 10,128.60 and 2,857.92

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Solution

The fourth proportional to 6,750.78, 10,128.60 and 2,857.92 is: 4,287.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,750.78 : 10,128.60 = 2,857.92 : x
  2. Step 2: Convert to fraction form
    6,750.78/10,128.60 = 2,857.92/x
  3. Step 3: Cross multiply
    6,750.78x = 10,128.60 × 2,857.92
  4. Step 4: Simplify right side
    6,750.78x = 28,946,728.51
  5. Step 5: Solve for x
    x = 28,946,728.51/6,750.78
  6. Step 6: Final answer
    x = 4,287.91

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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.