Home / 8,578.40-12,865.32-3,645.50

Finding the Fourth Proportional to 8,578.40, 12,865.32 and 3,645.50

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Solution

The fourth proportional to 8,578.40, 12,865.32 and 3,645.50 is: 5,467.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.40 : 12,865.32 = 3,645.50 : x
  2. Step 2: Convert to fraction form
    8,578.40/12,865.32 = 3,645.50/x
  3. Step 3: Cross multiply
    8,578.40x = 12,865.32 × 3,645.50
  4. Step 4: Simplify right side
    8,578.40x = 46,900,524.06
  5. Step 5: Solve for x
    x = 46,900,524.06/8,578.40
  6. Step 6: Final answer
    x = 5,467.28

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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.