Home / 13,938.08-20,913.96-6,137.60

Finding the Fourth Proportional to 13,938.08, 20,913.96 and 6,137.60

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Solution

The fourth proportional to 13,938.08, 20,913.96 and 6,137.60 is: 9,209.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.08 : 20,913.96 = 6,137.60 : x
  2. Step 2: Convert to fraction form
    13,938.08/20,913.96 = 6,137.60/x
  3. Step 3: Cross multiply
    13,938.08x = 20,913.96 × 6,137.60
  4. Step 4: Simplify right side
    13,938.08x = 128,361,520.90
  5. Step 5: Solve for x
    x = 128,361,520.90/13,938.08
  6. Step 6: Final answer
    x = 9,209.41

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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.