Home / 20,523.28-28,321.80-11,570.80

Finding the Fourth Proportional to 20,523.28, 28,321.80 and 11,570.80

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Solution

The fourth proportional to 20,523.28, 28,321.80 and 11,570.80 is: 15,967.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,523.28 : 28,321.80 = 11,570.80 : x
  2. Step 2: Convert to fraction form
    20,523.28/28,321.80 = 11,570.80/x
  3. Step 3: Cross multiply
    20,523.28x = 28,321.80 × 11,570.80
  4. Step 4: Simplify right side
    20,523.28x = 327,705,883.44
  5. Step 5: Solve for x
    x = 327,705,883.44/20,523.28
  6. Step 6: Final answer
    x = 15,967.52

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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.