Home / 3,116.45-4,298.78-2,122.17

Finding the Fourth Proportional to 3,116.45, 4,298.78 and 2,122.17

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Solution

The fourth proportional to 3,116.45, 4,298.78 and 2,122.17 is: 2,927.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.45 : 4,298.78 = 2,122.17 : x
  2. Step 2: Convert to fraction form
    3,116.45/4,298.78 = 2,122.17/x
  3. Step 3: Cross multiply
    3,116.45x = 4,298.78 × 2,122.17
  4. Step 4: Simplify right side
    3,116.45x = 9,122,747.26
  5. Step 5: Solve for x
    x = 9,122,747.26/3,116.45
  6. Step 6: Final answer
    x = 2,927.29

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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.