Home / 8,678.45-13,018.21-2,438.98

Finding the Fourth Proportional to 8,678.45, 13,018.21 and 2,438.98

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Solution

The fourth proportional to 8,678.45, 13,018.21 and 2,438.98 is: 3,658.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.45 : 13,018.21 = 2,438.98 : x
  2. Step 2: Convert to fraction form
    8,678.45/13,018.21 = 2,438.98/x
  3. Step 3: Cross multiply
    8,678.45x = 13,018.21 × 2,438.98
  4. Step 4: Simplify right side
    8,678.45x = 31,751,115.18
  5. Step 5: Solve for x
    x = 31,751,115.18/8,678.45
  6. Step 6: Final answer
    x = 3,658.61

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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.