Home / 21,580.44-29,778.87-12,020

Finding the Fourth Proportional to 21,580.44, 29,778.87 and 12,020

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Solution

The fourth proportional to 21,580.44, 29,778.87 and 12,020 is: 16,586.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.44 : 29,778.87 = 12,020 : x
  2. Step 2: Convert to fraction form
    21,580.44/29,778.87 = 12,020/x
  3. Step 3: Cross multiply
    21,580.44x = 29,778.87 × 12,020
  4. Step 4: Simplify right side
    21,580.44x = 357,942,017.40
  5. Step 5: Solve for x
    x = 357,942,017.40/21,580.44
  6. Step 6: Final answer
    x = 16,586.41

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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.