Home / 11,385.20-17,076.84-6,439.28

Finding the Fourth Proportional to 11,385.20, 17,076.84 and 6,439.28

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Solution

The fourth proportional to 11,385.20, 17,076.84 and 6,439.28 is: 9,658.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.20 : 17,076.84 = 6,439.28 : x
  2. Step 2: Convert to fraction form
    11,385.20/17,076.84 = 6,439.28/x
  3. Step 3: Cross multiply
    11,385.20x = 17,076.84 × 6,439.28
  4. Step 4: Simplify right side
    11,385.20x = 109,962,554.28
  5. Step 5: Solve for x
    x = 109,962,554.28/11,385.20
  6. Step 6: Final answer
    x = 9,658.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.