Home / 21,081.54-29,097.99-12,129.96

Finding the Fourth Proportional to 21,081.54, 29,097.99 and 12,129.96

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Solution

The fourth proportional to 21,081.54, 29,097.99 and 12,129.96 is: 16,742.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.54 : 29,097.99 = 12,129.96 : x
  2. Step 2: Convert to fraction form
    21,081.54/29,097.99 = 12,129.96/x
  3. Step 3: Cross multiply
    21,081.54x = 29,097.99 × 12,129.96
  4. Step 4: Simplify right side
    21,081.54x = 352,957,454.78
  5. Step 5: Solve for x
    x = 352,957,454.78/21,081.54
  6. Step 6: Final answer
    x = 16,742.49

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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.