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Finding the Fourth Proportional to 21,705.78, 32,558.67 and 6,919.23

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Solution

The fourth proportional to 21,705.78, 32,558.67 and 6,919.23 is: 10,378.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.78 : 32,558.67 = 6,919.23 : x
  2. Step 2: Convert to fraction form
    21,705.78/32,558.67 = 6,919.23/x
  3. Step 3: Cross multiply
    21,705.78x = 32,558.67 × 6,919.23
  4. Step 4: Simplify right side
    21,705.78x = 225,280,926.22
  5. Step 5: Solve for x
    x = 225,280,926.22/21,705.78
  6. Step 6: Final answer
    x = 10,378.85

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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.