Home / 6,635.86-9,154.41-3,978.65

Finding the Fourth Proportional to 6,635.86, 9,154.41 and 3,978.65

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Solution

The fourth proportional to 6,635.86, 9,154.41 and 3,978.65 is: 5,488.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,635.86 : 9,154.41 = 3,978.65 : x
  2. Step 2: Convert to fraction form
    6,635.86/9,154.41 = 3,978.65/x
  3. Step 3: Cross multiply
    6,635.86x = 9,154.41 × 3,978.65
  4. Step 4: Simplify right side
    6,635.86x = 36,422,193.35
  5. Step 5: Solve for x
    x = 36,422,193.35/6,635.86
  6. Step 6: Final answer
    x = 5,488.69

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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.