Home / 4,811.60-6,639.70-2,687

Finding the Fourth Proportional to 4,811.60, 6,639.70 and 2,687

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Solution

The fourth proportional to 4,811.60, 6,639.70 and 2,687 is: 3,707.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,811.60 : 6,639.70 = 2,687 : x
  2. Step 2: Convert to fraction form
    4,811.60/6,639.70 = 2,687/x
  3. Step 3: Cross multiply
    4,811.60x = 6,639.70 × 2,687
  4. Step 4: Simplify right side
    4,811.60x = 17,840,873.90
  5. Step 5: Solve for x
    x = 17,840,873.90/4,811.60
  6. Step 6: Final answer
    x = 3,707.89

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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.