Home / 5,187.70-7,782.90-2,721.86

Finding the Fourth Proportional to 5,187.70, 7,782.90 and 2,721.86

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Solution

The fourth proportional to 5,187.70, 7,782.90 and 2,721.86 is: 4,083.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.70 : 7,782.90 = 2,721.86 : x
  2. Step 2: Convert to fraction form
    5,187.70/7,782.90 = 2,721.86/x
  3. Step 3: Cross multiply
    5,187.70x = 7,782.90 × 2,721.86
  4. Step 4: Simplify right side
    5,187.70x = 21,183,964.19
  5. Step 5: Solve for x
    x = 21,183,964.19/5,187.70
  6. Step 6: Final answer
    x = 4,083.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.