Home / 21,668.05-29,880.59-13,171.33

Finding the Fourth Proportional to 21,668.05, 29,880.59 and 13,171.33

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Solution

The fourth proportional to 21,668.05, 29,880.59 and 13,171.33 is: 18,163.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668.05 : 29,880.59 = 13,171.33 : x
  2. Step 2: Convert to fraction form
    21,668.05/29,880.59 = 13,171.33/x
  3. Step 3: Cross multiply
    21,668.05x = 29,880.59 × 13,171.33
  4. Step 4: Simplify right side
    21,668.05x = 393,567,045.63
  5. Step 5: Solve for x
    x = 393,567,045.63/21,668.05
  6. Step 6: Final answer
    x = 18,163.47

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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.