Home / 3,886.86-5,363.76-2,118.50

Finding the Fourth Proportional to 3,886.86, 5,363.76 and 2,118.50

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Solution

The fourth proportional to 3,886.86, 5,363.76 and 2,118.50 is: 2,923.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.86 : 5,363.76 = 2,118.50 : x
  2. Step 2: Convert to fraction form
    3,886.86/5,363.76 = 2,118.50/x
  3. Step 3: Cross multiply
    3,886.86x = 5,363.76 × 2,118.50
  4. Step 4: Simplify right side
    3,886.86x = 11,363,125.56
  5. Step 5: Solve for x
    x = 11,363,125.56/3,886.86
  6. Step 6: Final answer
    x = 2,923.47

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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.