Home / 20,087.73-27,720.95-12,129.93

Finding the Fourth Proportional to 20,087.73, 27,720.95 and 12,129.93

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Solution

The fourth proportional to 20,087.73, 27,720.95 and 12,129.93 is: 16,739.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.73 : 27,720.95 = 12,129.93 : x
  2. Step 2: Convert to fraction form
    20,087.73/27,720.95 = 12,129.93/x
  3. Step 3: Cross multiply
    20,087.73x = 27,720.95 × 12,129.93
  4. Step 4: Simplify right side
    20,087.73x = 336,253,122.38
  5. Step 5: Solve for x
    x = 336,253,122.38/20,087.73
  6. Step 6: Final answer
    x = 16,739.23

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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.