Home / 15,494.22-21,387.09-9,120.73

Finding the Fourth Proportional to 15,494.22, 21,387.09 and 9,120.73

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Solution

The fourth proportional to 15,494.22, 21,387.09 and 9,120.73 is: 12,589.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.22 : 21,387.09 = 9,120.73 : x
  2. Step 2: Convert to fraction form
    15,494.22/21,387.09 = 9,120.73/x
  3. Step 3: Cross multiply
    15,494.22x = 21,387.09 × 9,120.73
  4. Step 4: Simplify right side
    15,494.22x = 195,065,873.38
  5. Step 5: Solve for x
    x = 195,065,873.38/15,494.22
  6. Step 6: Final answer
    x = 12,589.59

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Half scale
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Double scale
Find fourth proportional to 15,495.22, 21,388.47 and 9,121.73
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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.