Home / 21,620.04-29,830.56-13,121.96

Finding the Fourth Proportional to 21,620.04, 29,830.56 and 13,121.96

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Solution

The fourth proportional to 21,620.04, 29,830.56 and 13,121.96 is: 18,105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.04 : 29,830.56 = 13,121.96 : x
  2. Step 2: Convert to fraction form
    21,620.04/29,830.56 = 13,121.96/x
  3. Step 3: Cross multiply
    21,620.04x = 29,830.56 × 13,121.96
  4. Step 4: Simplify right side
    21,620.04x = 391,435,349.49
  5. Step 5: Solve for x
    x = 391,435,349.49/21,620.04
  6. Step 6: Final answer
    x = 18,105.21

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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.