Home / 13,438.60-20,150.70-5,638.60

Finding the Fourth Proportional to 13,438.60, 20,150.70 and 5,638.60

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Solution

The fourth proportional to 13,438.60, 20,150.70 and 5,638.60 is: 8,454.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.60 : 20,150.70 = 5,638.60 : x
  2. Step 2: Convert to fraction form
    13,438.60/20,150.70 = 5,638.60/x
  3. Step 3: Cross multiply
    13,438.60x = 20,150.70 × 5,638.60
  4. Step 4: Simplify right side
    13,438.60x = 113,621,737.02
  5. Step 5: Solve for x
    x = 113,621,737.02/13,438.60
  6. Step 6: Final answer
    x = 8,454.88

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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.