Home / 20,668.54-28,523.16-11,715.68

Finding the Fourth Proportional to 20,668.54, 28,523.16 and 11,715.68

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Solution

The fourth proportional to 20,668.54, 28,523.16 and 11,715.68 is: 16,167.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.54 : 28,523.16 = 11,715.68 : x
  2. Step 2: Convert to fraction form
    20,668.54/28,523.16 = 11,715.68/x
  3. Step 3: Cross multiply
    20,668.54x = 28,523.16 × 11,715.68
  4. Step 4: Simplify right side
    20,668.54x = 334,168,215.15
  5. Step 5: Solve for x
    x = 334,168,215.15/20,668.54
  6. Step 6: Final answer
    x = 16,167.96

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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.