Home / 3,911.34-5,397.60-2,118.81

Finding the Fourth Proportional to 3,911.34, 5,397.60 and 2,118.81

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Solution

The fourth proportional to 3,911.34, 5,397.60 and 2,118.81 is: 2,923.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.34 : 5,397.60 = 2,118.81 : x
  2. Step 2: Convert to fraction form
    3,911.34/5,397.60 = 2,118.81/x
  3. Step 3: Cross multiply
    3,911.34x = 5,397.60 × 2,118.81
  4. Step 4: Simplify right side
    3,911.34x = 11,436,477.74
  5. Step 5: Solve for x
    x = 11,436,477.74/3,911.34
  6. Step 6: Final answer
    x = 2,923.93

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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.