Home / 21,415.75-29,553.78-11,986.54

Finding the Fourth Proportional to 21,415.75, 29,553.78 and 11,986.54

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Solution

The fourth proportional to 21,415.75, 29,553.78 and 11,986.54 is: 16,541.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.75 : 29,553.78 = 11,986.54 : x
  2. Step 2: Convert to fraction form
    21,415.75/29,553.78 = 11,986.54/x
  3. Step 3: Cross multiply
    21,415.75x = 29,553.78 × 11,986.54
  4. Step 4: Simplify right side
    21,415.75x = 354,247,566.12
  5. Step 5: Solve for x
    x = 354,247,566.12/21,415.75
  6. Step 6: Final answer
    x = 16,541.45

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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.