Home / 20,618.91-28,449.77-11,668.59

Finding the Fourth Proportional to 20,618.91, 28,449.77 and 11,668.59

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Solution

The fourth proportional to 20,618.91, 28,449.77 and 11,668.59 is: 16,100.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.91 : 28,449.77 = 11,668.59 : x
  2. Step 2: Convert to fraction form
    20,618.91/28,449.77 = 11,668.59/x
  3. Step 3: Cross multiply
    20,618.91x = 28,449.77 × 11,668.59
  4. Step 4: Simplify right side
    20,618.91x = 331,968,643.38
  5. Step 5: Solve for x
    x = 331,968,643.38/20,618.91
  6. Step 6: Final answer
    x = 16,100.20

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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.