Home / 5,405.40-8,107.29-2,120.76

Finding the Fourth Proportional to 5,405.40, 8,107.29 and 2,120.76

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Solution

The fourth proportional to 5,405.40, 8,107.29 and 2,120.76 is: 3,180.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.40 : 8,107.29 = 2,120.76 : x
  2. Step 2: Convert to fraction form
    5,405.40/8,107.29 = 2,120.76/x
  3. Step 3: Cross multiply
    5,405.40x = 8,107.29 × 2,120.76
  4. Step 4: Simplify right side
    5,405.40x = 17,193,616.34
  5. Step 5: Solve for x
    x = 17,193,616.34/5,405.40
  6. Step 6: Final answer
    x = 3,180.82

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1.5x scale

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.