Home / 6,428.40-8,871.30-3,910.11

Finding the Fourth Proportional to 6,428.40, 8,871.30 and 3,910.11

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Solution

The fourth proportional to 6,428.40, 8,871.30 and 3,910.11 is: 5,396.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.40 : 8,871.30 = 3,910.11 : x
  2. Step 2: Convert to fraction form
    6,428.40/8,871.30 = 3,910.11/x
  3. Step 3: Cross multiply
    6,428.40x = 8,871.30 × 3,910.11
  4. Step 4: Simplify right side
    6,428.40x = 34,687,758.84
  5. Step 5: Solve for x
    x = 34,687,758.84/6,428.40
  6. Step 6: Final answer
    x = 5,396.02

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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.