Home / 20,989.88-28,956.66-14,181.70

Finding the Fourth Proportional to 20,989.88, 28,956.66 and 14,181.70

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Solution

The fourth proportional to 20,989.88, 28,956.66 and 14,181.70 is: 19,564.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.88 : 28,956.66 = 14,181.70 : x
  2. Step 2: Convert to fraction form
    20,989.88/28,956.66 = 14,181.70/x
  3. Step 3: Cross multiply
    20,989.88x = 28,956.66 × 14,181.70
  4. Step 4: Simplify right side
    20,989.88x = 410,654,629.67
  5. Step 5: Solve for x
    x = 410,654,629.67/20,989.88
  6. Step 6: Final answer
    x = 19,564.42

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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.