Home / 8,438.80-11,639.70-5,786.44

Finding the Fourth Proportional to 8,438.80, 11,639.70 and 5,786.44

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Solution

The fourth proportional to 8,438.80, 11,639.70 and 5,786.44 is: 7,981.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.80 : 11,639.70 = 5,786.44 : x
  2. Step 2: Convert to fraction form
    8,438.80/11,639.70 = 5,786.44/x
  3. Step 3: Cross multiply
    8,438.80x = 11,639.70 × 5,786.44
  4. Step 4: Simplify right side
    8,438.80x = 67,352,425.67
  5. Step 5: Solve for x
    x = 67,352,425.67/8,438.80
  6. Step 6: Final answer
    x = 7,981.28

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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.