Home / 8,435.80-12,661.44-4,278.70

Finding the Fourth Proportional to 8,435.80, 12,661.44 and 4,278.70

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Solution

The fourth proportional to 8,435.80, 12,661.44 and 4,278.70 is: 6,421.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,435.80 : 12,661.44 = 4,278.70 : x
  2. Step 2: Convert to fraction form
    8,435.80/12,661.44 = 4,278.70/x
  3. Step 3: Cross multiply
    8,435.80x = 12,661.44 × 4,278.70
  4. Step 4: Simplify right side
    8,435.80x = 54,174,503.33
  5. Step 5: Solve for x
    x = 54,174,503.33/8,435.80
  6. Step 6: Final answer
    x = 6,421.98

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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.