Home / 13,222.81-18,245.49-8,513.47

Finding the Fourth Proportional to 13,222.81, 18,245.49 and 8,513.47

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Solution

The fourth proportional to 13,222.81, 18,245.49 and 8,513.47 is: 11,747.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.81 : 18,245.49 = 8,513.47 : x
  2. Step 2: Convert to fraction form
    13,222.81/18,245.49 = 8,513.47/x
  3. Step 3: Cross multiply
    13,222.81x = 18,245.49 × 8,513.47
  4. Step 4: Simplify right side
    13,222.81x = 155,332,431.75
  5. Step 5: Solve for x
    x = 155,332,431.75/13,222.81
  6. Step 6: Final answer
    x = 11,747.31

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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.