Home / 20,255.70-27,945.07-12,688.85

Finding the Fourth Proportional to 20,255.70, 27,945.07 and 12,688.85

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Solution

The fourth proportional to 20,255.70, 27,945.07 and 12,688.85 is: 17,505.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.70 : 27,945.07 = 12,688.85 : x
  2. Step 2: Convert to fraction form
    20,255.70/27,945.07 = 12,688.85/x
  3. Step 3: Cross multiply
    20,255.70x = 27,945.07 × 12,688.85
  4. Step 4: Simplify right side
    20,255.70x = 354,590,839.61
  5. Step 5: Solve for x
    x = 354,590,839.61/20,255.70
  6. Step 6: Final answer
    x = 17,505.73

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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.