Home / 20,668.92-28,513.90-13,771.96

Finding the Fourth Proportional to 20,668.92, 28,513.90 and 13,771.96

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Solution

The fourth proportional to 20,668.92, 28,513.90 and 13,771.96 is: 18,999.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.92 : 28,513.90 = 13,771.96 : x
  2. Step 2: Convert to fraction form
    20,668.92/28,513.90 = 13,771.96/x
  3. Step 3: Cross multiply
    20,668.92x = 28,513.90 × 13,771.96
  4. Step 4: Simplify right side
    20,668.92x = 392,692,290.24
  5. Step 5: Solve for x
    x = 392,692,290.24/20,668.92
  6. Step 6: Final answer
    x = 18,999.17

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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.