Home / 13,406.60-20,112.78-5,611.40

Finding the Fourth Proportional to 13,406.60, 20,112.78 and 5,611.40

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Solution

The fourth proportional to 13,406.60, 20,112.78 and 5,611.40 is: 8,418.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.60 : 20,112.78 = 5,611.40 : x
  2. Step 2: Convert to fraction form
    13,406.60/20,112.78 = 5,611.40/x
  3. Step 3: Cross multiply
    13,406.60x = 20,112.78 × 5,611.40
  4. Step 4: Simplify right side
    13,406.60x = 112,860,853.69
  5. Step 5: Solve for x
    x = 112,860,853.69/13,406.60
  6. Step 6: Final answer
    x = 8,418.31

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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.