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Finding the Fourth Proportional to 6,438.90, 8,885.88 and 3,786.24

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Solution

The fourth proportional to 6,438.90, 8,885.88 and 3,786.24 is: 5,225.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.90 : 8,885.88 = 3,786.24 : x
  2. Step 2: Convert to fraction form
    6,438.90/8,885.88 = 3,786.24/x
  3. Step 3: Cross multiply
    6,438.90x = 8,885.88 × 3,786.24
  4. Step 4: Simplify right side
    6,438.90x = 33,644,074.29
  5. Step 5: Solve for x
    x = 33,644,074.29/6,438.90
  6. Step 6: Final answer
    x = 5,225.13

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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.