Home / 2,116.11-3,172.44-1,420.66

Finding the Fourth Proportional to 2,116.11, 3,172.44 and 1,420.66

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Solution

The fourth proportional to 2,116.11, 3,172.44 and 1,420.66 is: 2,129.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.11 : 3,172.44 = 1,420.66 : x
  2. Step 2: Convert to fraction form
    2,116.11/3,172.44 = 1,420.66/x
  3. Step 3: Cross multiply
    2,116.11x = 3,172.44 × 1,420.66
  4. Step 4: Simplify right side
    2,116.11x = 4,506,942.75
  5. Step 5: Solve for x
    x = 4,506,942.75/2,116.11
  6. Step 6: Final answer
    x = 2,129.82

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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.