Home / 3,780.87-5,215.92-2,520.70

Finding the Fourth Proportional to 3,780.87, 5,215.92 and 2,520.70

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Solution

The fourth proportional to 3,780.87, 5,215.92 and 2,520.70 is: 3,477.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.87 : 5,215.92 = 2,520.70 : x
  2. Step 2: Convert to fraction form
    3,780.87/5,215.92 = 2,520.70/x
  3. Step 3: Cross multiply
    3,780.87x = 5,215.92 × 2,520.70
  4. Step 4: Simplify right side
    3,780.87x = 13,147,769.54
  5. Step 5: Solve for x
    x = 13,147,769.54/3,780.87
  6. Step 6: Final answer
    x = 3,477.45

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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.