Home / 12,021.58-16,584.93-7,990.36

Finding the Fourth Proportional to 12,021.58, 16,584.93 and 7,990.36

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Solution

The fourth proportional to 12,021.58, 16,584.93 and 7,990.36 is: 11,023.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.58 : 16,584.93 = 7,990.36 : x
  2. Step 2: Convert to fraction form
    12,021.58/16,584.93 = 7,990.36/x
  3. Step 3: Cross multiply
    12,021.58x = 16,584.93 × 7,990.36
  4. Step 4: Simplify right side
    12,021.58x = 132,519,519.81
  5. Step 5: Solve for x
    x = 132,519,519.81/12,021.58
  6. Step 6: Final answer
    x = 11,023.47

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Double scale
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Similar ratio
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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.