Home / 3,910.95-5,397.12-2,142.51

Finding the Fourth Proportional to 3,910.95, 5,397.12 and 2,142.51

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Solution

The fourth proportional to 3,910.95, 5,397.12 and 2,142.51 is: 2,956.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.95 : 5,397.12 = 2,142.51 : x
  2. Step 2: Convert to fraction form
    3,910.95/5,397.12 = 2,142.51/x
  3. Step 3: Cross multiply
    3,910.95x = 5,397.12 × 2,142.51
  4. Step 4: Simplify right side
    3,910.95x = 11,563,383.57
  5. Step 5: Solve for x
    x = 11,563,383.57/3,910.95
  6. Step 6: Final answer
    x = 2,956.67

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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.