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Finding the Fourth Proportional to 21,722.49, 29,978.03 and 16,998.57

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Solution

The fourth proportional to 21,722.49, 29,978.03 and 16,998.57 is: 23,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.49 : 29,978.03 = 16,998.57 : x
  2. Step 2: Convert to fraction form
    21,722.49/29,978.03 = 16,998.57/x
  3. Step 3: Cross multiply
    21,722.49x = 29,978.03 × 16,998.57
  4. Step 4: Simplify right side
    21,722.49x = 509,583,556.42
  5. Step 5: Solve for x
    x = 509,583,556.42/21,722.49
  6. Step 6: Final answer
    x = 23,458.80

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1.5x scale

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.