Home / 20,774.28-28,668.42-11,342.88

Finding the Fourth Proportional to 20,774.28, 28,668.42 and 11,342.88

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Solution

The fourth proportional to 20,774.28, 28,668.42 and 11,342.88 is: 15,653.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.28 : 28,668.42 = 11,342.88 : x
  2. Step 2: Convert to fraction form
    20,774.28/28,668.42 = 11,342.88/x
  3. Step 3: Cross multiply
    20,774.28x = 28,668.42 × 11,342.88
  4. Step 4: Simplify right side
    20,774.28x = 325,182,447.85
  5. Step 5: Solve for x
    x = 325,182,447.85/20,774.28
  6. Step 6: Final answer
    x = 15,653.13

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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.