Home / 18,821.41-28,232.12-7,720.26

Finding the Fourth Proportional to 18,821.41, 28,232.12 and 7,720.26

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Solution

The fourth proportional to 18,821.41, 28,232.12 and 7,720.26 is: 11,580.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.41 : 28,232.12 = 7,720.26 : x
  2. Step 2: Convert to fraction form
    18,821.41/28,232.12 = 7,720.26/x
  3. Step 3: Cross multiply
    18,821.41x = 28,232.12 × 7,720.26
  4. Step 4: Simplify right side
    18,821.41x = 217,959,357.27
  5. Step 5: Solve for x
    x = 217,959,357.27/18,821.41
  6. Step 6: Final answer
    x = 11,580.39

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.