Home / 6,438.68-8,885.51-3,920.89

Finding the Fourth Proportional to 6,438.68, 8,885.51 and 3,920.89

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Solution

The fourth proportional to 6,438.68, 8,885.51 and 3,920.89 is: 5,410.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.68 : 8,885.51 = 3,920.89 : x
  2. Step 2: Convert to fraction form
    6,438.68/8,885.51 = 3,920.89/x
  3. Step 3: Cross multiply
    6,438.68x = 8,885.51 × 3,920.89
  4. Step 4: Simplify right side
    6,438.68x = 34,839,107.30
  5. Step 5: Solve for x
    x = 34,839,107.30/6,438.68
  6. Step 6: Final answer
    x = 5,410.91

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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.