Home / 2,113.30-2,917.90-1,367.70

Finding the Fourth Proportional to 2,113.30, 2,917.90 and 1,367.70

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Solution

The fourth proportional to 2,113.30, 2,917.90 and 1,367.70 is: 1,888.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.30 : 2,917.90 = 1,367.70 : x
  2. Step 2: Convert to fraction form
    2,113.30/2,917.90 = 1,367.70/x
  3. Step 3: Cross multiply
    2,113.30x = 2,917.90 × 1,367.70
  4. Step 4: Simplify right side
    2,113.30x = 3,990,811.83
  5. Step 5: Solve for x
    x = 3,990,811.83/2,113.30
  6. Step 6: Final answer
    x = 1,888.43

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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.