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Finding the Fourth Proportional to 4,891.55, 6,748.69 and 3,124.18

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Solution

The fourth proportional to 4,891.55, 6,748.69 and 3,124.18 is: 4,310.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.55 : 6,748.69 = 3,124.18 : x
  2. Step 2: Convert to fraction form
    4,891.55/6,748.69 = 3,124.18/x
  3. Step 3: Cross multiply
    4,891.55x = 6,748.69 × 3,124.18
  4. Step 4: Simplify right side
    4,891.55x = 21,084,072.96
  5. Step 5: Solve for x
    x = 21,084,072.96/4,891.55
  6. Step 6: Final answer
    x = 4,310.31

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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.