Home / 8,678.72-13,015.39-3,131.35

Finding the Fourth Proportional to 8,678.72, 13,015.39 and 3,131.35

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Solution

The fourth proportional to 8,678.72, 13,015.39 and 3,131.35 is: 4,696.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.72 : 13,015.39 = 3,131.35 : x
  2. Step 2: Convert to fraction form
    8,678.72/13,015.39 = 3,131.35/x
  3. Step 3: Cross multiply
    8,678.72x = 13,015.39 × 3,131.35
  4. Step 4: Simplify right side
    8,678.72x = 40,755,712.85
  5. Step 5: Solve for x
    x = 40,755,712.85/8,678.72
  6. Step 6: Final answer
    x = 4,696.05

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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.