Home / 4,875.92-6,728.72-2,780

Finding the Fourth Proportional to 4,875.92, 6,728.72 and 2,780

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Solution

The fourth proportional to 4,875.92, 6,728.72 and 2,780 is: 3,836.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,875.92 : 6,728.72 = 2,780 : x
  2. Step 2: Convert to fraction form
    4,875.92/6,728.72 = 2,780/x
  3. Step 3: Cross multiply
    4,875.92x = 6,728.72 × 2,780
  4. Step 4: Simplify right side
    4,875.92x = 18,705,841.60
  5. Step 5: Solve for x
    x = 18,705,841.60/4,875.92
  6. Step 6: Final answer
    x = 3,836.37

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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.