Home / 13,756.40-20,634.60-4,991.60

Finding the Fourth Proportional to 13,756.40, 20,634.60 and 4,991.60

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Solution

The fourth proportional to 13,756.40, 20,634.60 and 4,991.60 is: 7,487.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.40 : 20,634.60 = 4,991.60 : x
  2. Step 2: Convert to fraction form
    13,756.40/20,634.60 = 4,991.60/x
  3. Step 3: Cross multiply
    13,756.40x = 20,634.60 × 4,991.60
  4. Step 4: Simplify right side
    13,756.40x = 102,999,669.36
  5. Step 5: Solve for x
    x = 102,999,669.36/13,756.40
  6. Step 6: Final answer
    x = 7,487.40

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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.