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Finding the Fourth Proportional to 4,878, 6,731.64 and 2,670

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Solution

The fourth proportional to 4,878, 6,731.64 and 2,670 is: 3,684.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,878 : 6,731.64 = 2,670 : x
  2. Step 2: Convert to fraction form
    4,878/6,731.64 = 2,670/x
  3. Step 3: Cross multiply
    4,878x = 6,731.64 × 2,670
  4. Step 4: Simplify right side
    4,878x = 17,973,478.80
  5. Step 5: Solve for x
    x = 17,973,478.80/4,878
  6. Step 6: Final answer
    x = 3,684.60

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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.