Home / 21,078.36-29,087.65-11,518.27

Finding the Fourth Proportional to 21,078.36, 29,087.65 and 11,518.27

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Solution

The fourth proportional to 21,078.36, 29,087.65 and 11,518.27 is: 15,894.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.36 : 29,087.65 = 11,518.27 : x
  2. Step 2: Convert to fraction form
    21,078.36/29,087.65 = 11,518.27/x
  3. Step 3: Cross multiply
    21,078.36x = 29,087.65 × 11,518.27
  4. Step 4: Simplify right side
    21,078.36x = 335,039,406.37
  5. Step 5: Solve for x
    x = 335,039,406.37/21,078.36
  6. Step 6: Final answer
    x = 15,894.95

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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.