Home / 20,774.40-28,669.26-11,343.56

Finding the Fourth Proportional to 20,774.40, 28,669.26 and 11,343.56

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Solution

The fourth proportional to 20,774.40, 28,669.26 and 11,343.56 is: 15,654.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.40 : 28,669.26 = 11,343.56 : x
  2. Step 2: Convert to fraction form
    20,774.40/28,669.26 = 11,343.56/x
  3. Step 3: Cross multiply
    20,774.40x = 28,669.26 × 11,343.56
  4. Step 4: Simplify right side
    20,774.40x = 325,211,470.97
  5. Step 5: Solve for x
    x = 325,211,470.97/20,774.40
  6. Step 6: Final answer
    x = 15,654.43

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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.