Home / 13,720.41-18,940.70-9,190.89

Finding the Fourth Proportional to 13,720.41, 18,940.70 and 9,190.89

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Solution

The fourth proportional to 13,720.41, 18,940.70 and 9,190.89 is: 12,687.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.41 : 18,940.70 = 9,190.89 : x
  2. Step 2: Convert to fraction form
    13,720.41/18,940.70 = 9,190.89/x
  3. Step 3: Cross multiply
    13,720.41x = 18,940.70 × 9,190.89
  4. Step 4: Simplify right side
    13,720.41x = 174,081,913.20
  5. Step 5: Solve for x
    x = 174,081,913.20/13,720.41
  6. Step 6: Final answer
    x = 12,687.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.