Home / 13,720.98-20,481.59-12,415.38

Finding the Fourth Proportional to 13,720.98, 20,481.59 and 12,415.38

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Solution

The fourth proportional to 13,720.98, 20,481.59 and 12,415.38 is: 18,532.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.98 : 20,481.59 = 12,415.38 : x
  2. Step 2: Convert to fraction form
    13,720.98/20,481.59 = 12,415.38/x
  3. Step 3: Cross multiply
    13,720.98x = 20,481.59 × 12,415.38
  4. Step 4: Simplify right side
    13,720.98x = 254,286,660.78
  5. Step 5: Solve for x
    x = 254,286,660.78/13,720.98
  6. Step 6: Final answer
    x = 18,532.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.