Home / 3,856.02-5,321.70-2,178.06

Finding the Fourth Proportional to 3,856.02, 5,321.70 and 2,178.06

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Solution

The fourth proportional to 3,856.02, 5,321.70 and 2,178.06 is: 3,005.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.02 : 5,321.70 = 2,178.06 : x
  2. Step 2: Convert to fraction form
    3,856.02/5,321.70 = 2,178.06/x
  3. Step 3: Cross multiply
    3,856.02x = 5,321.70 × 2,178.06
  4. Step 4: Simplify right side
    3,856.02x = 11,590,981.90
  5. Step 5: Solve for x
    x = 11,590,981.90/3,856.02
  6. Step 6: Final answer
    x = 3,005.94

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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.