Home / 21,078.16-29,087.51-11,517.84

Finding the Fourth Proportional to 21,078.16, 29,087.51 and 11,517.84

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Solution

The fourth proportional to 21,078.16, 29,087.51 and 11,517.84 is: 15,894.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.16 : 29,087.51 = 11,517.84 : x
  2. Step 2: Convert to fraction form
    21,078.16/29,087.51 = 11,517.84/x
  3. Step 3: Cross multiply
    21,078.16x = 29,087.51 × 11,517.84
  4. Step 4: Simplify right side
    21,078.16x = 335,025,228.59
  5. Step 5: Solve for x
    x = 335,025,228.59/21,078.16
  6. Step 6: Final answer
    x = 15,894.43

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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.