Home / 20,107.56-27,747.18-12,145.08

Finding the Fourth Proportional to 20,107.56, 27,747.18 and 12,145.08

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Solution

The fourth proportional to 20,107.56, 27,747.18 and 12,145.08 is: 16,759.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.56 : 27,747.18 = 12,145.08 : x
  2. Step 2: Convert to fraction form
    20,107.56/27,747.18 = 12,145.08/x
  3. Step 3: Cross multiply
    20,107.56x = 27,747.18 × 12,145.08
  4. Step 4: Simplify right side
    20,107.56x = 336,991,720.87
  5. Step 5: Solve for x
    x = 336,991,720.87/20,107.56
  6. Step 6: Final answer
    x = 16,759.45

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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.