Home / 3,156.30-4,356.79-2,164.86

Finding the Fourth Proportional to 3,156.30, 4,356.79 and 2,164.86

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Solution

The fourth proportional to 3,156.30, 4,356.79 and 2,164.86 is: 2,988.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.30 : 4,356.79 = 2,164.86 : x
  2. Step 2: Convert to fraction form
    3,156.30/4,356.79 = 2,164.86/x
  3. Step 3: Cross multiply
    3,156.30x = 4,356.79 × 2,164.86
  4. Step 4: Simplify right side
    3,156.30x = 9,431,834.99
  5. Step 5: Solve for x
    x = 9,431,834.99/3,156.30
  6. Step 6: Final answer
    x = 2,988.26

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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.