Home / 21,551.52-29,728.94-13,580.04

Finding the Fourth Proportional to 21,551.52, 29,728.94 and 13,580.04

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Solution

The fourth proportional to 21,551.52, 29,728.94 and 13,580.04 is: 18,732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,551.52 : 29,728.94 = 13,580.04 : x
  2. Step 2: Convert to fraction form
    21,551.52/29,728.94 = 13,580.04/x
  3. Step 3: Cross multiply
    21,551.52x = 29,728.94 × 13,580.04
  4. Step 4: Simplify right side
    21,551.52x = 403,720,194.36
  5. Step 5: Solve for x
    x = 403,720,194.36/21,551.52
  6. Step 6: Final answer
    x = 18,732.79

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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.