Home / 3,808.31-5,255.55-2,129.67

Finding the Fourth Proportional to 3,808.31, 5,255.55 and 2,129.67

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Solution

The fourth proportional to 3,808.31, 5,255.55 and 2,129.67 is: 2,938.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.31 : 5,255.55 = 2,129.67 : x
  2. Step 2: Convert to fraction form
    3,808.31/5,255.55 = 2,129.67/x
  3. Step 3: Cross multiply
    3,808.31x = 5,255.55 × 2,129.67
  4. Step 4: Simplify right side
    3,808.31x = 11,192,587.17
  5. Step 5: Solve for x
    x = 11,192,587.17/3,808.31
  6. Step 6: Final answer
    x = 2,938.99

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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.