Home / 8,678.90-13,017.42-2,439.12

Finding the Fourth Proportional to 8,678.90, 13,017.42 and 2,439.12

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Solution

The fourth proportional to 8,678.90, 13,017.42 and 2,439.12 is: 3,658.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.90 : 13,017.42 = 2,439.12 : x
  2. Step 2: Convert to fraction form
    8,678.90/13,017.42 = 2,439.12/x
  3. Step 3: Cross multiply
    8,678.90x = 13,017.42 × 2,439.12
  4. Step 4: Simplify right side
    8,678.90x = 31,751,049.47
  5. Step 5: Solve for x
    x = 31,751,049.47/8,678.90
  6. Step 6: Final answer
    x = 3,658.42

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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.