Home / 6,428.16-8,871.52-3,910.45

Finding the Fourth Proportional to 6,428.16, 8,871.52 and 3,910.45

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Solution

The fourth proportional to 6,428.16, 8,871.52 and 3,910.45 is: 5,396.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.16 : 8,871.52 = 3,910.45 : x
  2. Step 2: Convert to fraction form
    6,428.16/8,871.52 = 3,910.45/x
  3. Step 3: Cross multiply
    6,428.16x = 8,871.52 × 3,910.45
  4. Step 4: Simplify right side
    6,428.16x = 34,691,635.38
  5. Step 5: Solve for x
    x = 34,691,635.38/6,428.16
  6. Step 6: Final answer
    x = 5,396.82

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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.