Home / 8,678.40-13,017.60-3,131.93

Finding the Fourth Proportional to 8,678.40, 13,017.60 and 3,131.93

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Solution

The fourth proportional to 8,678.40, 13,017.60 and 3,131.93 is: 4,697.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.40 : 13,017.60 = 3,131.93 : x
  2. Step 2: Convert to fraction form
    8,678.40/13,017.60 = 3,131.93/x
  3. Step 3: Cross multiply
    8,678.40x = 13,017.60 × 3,131.93
  4. Step 4: Simplify right side
    8,678.40x = 40,770,211.97
  5. Step 5: Solve for x
    x = 40,770,211.97/8,678.40
  6. Step 6: Final answer
    x = 4,697.90

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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.