Home / 20,476.28-28,257-11,523.80

Finding the Fourth Proportional to 20,476.28, 28,257 and 11,523.80

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Solution

The fourth proportional to 20,476.28, 28,257 and 11,523.80 is: 15,902.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476.28 : 28,257 = 11,523.80 : x
  2. Step 2: Convert to fraction form
    20,476.28/28,257 = 11,523.80/x
  3. Step 3: Cross multiply
    20,476.28x = 28,257 × 11,523.80
  4. Step 4: Simplify right side
    20,476.28x = 325,628,016.60
  5. Step 5: Solve for x
    x = 325,628,016.60/20,476.28
  6. Step 6: Final answer
    x = 15,902.69

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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.