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Finding the Fourth Proportional to 6,762.64, 10,119.29 and 3,990.64

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Solution

The fourth proportional to 6,762.64, 10,119.29 and 3,990.64 is: 5,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,762.64 : 10,119.29 = 3,990.64 : x
  2. Step 2: Convert to fraction form
    6,762.64/10,119.29 = 3,990.64/x
  3. Step 3: Cross multiply
    6,762.64x = 10,119.29 × 3,990.64
  4. Step 4: Simplify right side
    6,762.64x = 40,382,443.45
  5. Step 5: Solve for x
    x = 40,382,443.45/6,762.64
  6. Step 6: Final answer
    x = 5,971.40

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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.