Home / 21,786.74-32,678.28-6,991.64

Finding the Fourth Proportional to 21,786.74, 32,678.28 and 6,991.64

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Solution

The fourth proportional to 21,786.74, 32,678.28 and 6,991.64 is: 10,486.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,786.74 : 32,678.28 = 6,991.64 : x
  2. Step 2: Convert to fraction form
    21,786.74/32,678.28 = 6,991.64/x
  3. Step 3: Cross multiply
    21,786.74x = 32,678.28 × 6,991.64
  4. Step 4: Simplify right side
    21,786.74x = 228,474,769.58
  5. Step 5: Solve for x
    x = 228,474,769.58/21,786.74
  6. Step 6: Final answer
    x = 10,486.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.