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Finding the Fourth Proportional to 21,958.70, 32,861.50 and 17,963.78

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Solution

The fourth proportional to 21,958.70, 32,861.50 and 17,963.78 is: 26,883.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.70 : 32,861.50 = 17,963.78 : x
  2. Step 2: Convert to fraction form
    21,958.70/32,861.50 = 17,963.78/x
  3. Step 3: Cross multiply
    21,958.70x = 32,861.50 × 17,963.78
  4. Step 4: Simplify right side
    21,958.70x = 590,316,547.25
  5. Step 5: Solve for x
    x = 590,316,547.25/21,958.70
  6. Step 6: Final answer
    x = 26,883.04

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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.