Home / 20,668.14-28,531.83-13,220.46

Finding the Fourth Proportional to 20,668.14, 28,531.83 and 13,220.46

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Solution

The fourth proportional to 20,668.14, 28,531.83 and 13,220.46 is: 18,250.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.14 : 28,531.83 = 13,220.46 : x
  2. Step 2: Convert to fraction form
    20,668.14/28,531.83 = 13,220.46/x
  3. Step 3: Cross multiply
    20,668.14x = 28,531.83 × 13,220.46
  4. Step 4: Simplify right side
    20,668.14x = 377,203,917.24
  5. Step 5: Solve for x
    x = 377,203,917.24/20,668.14
  6. Step 6: Final answer
    x = 18,250.50

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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.