Home / 13,747.20-20,620.80-13,200.45

Finding the Fourth Proportional to 13,747.20, 20,620.80 and 13,200.45

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Solution

The fourth proportional to 13,747.20, 20,620.80 and 13,200.45 is: 19,800.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.20 : 20,620.80 = 13,200.45 : x
  2. Step 2: Convert to fraction form
    13,747.20/20,620.80 = 13,200.45/x
  3. Step 3: Cross multiply
    13,747.20x = 20,620.80 × 13,200.45
  4. Step 4: Simplify right side
    13,747.20x = 272,203,839.36
  5. Step 5: Solve for x
    x = 272,203,839.36/13,747.20
  6. Step 6: Final answer
    x = 19,800.68

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1.5x scale

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.