Home / 20,738.75-31,108.13-6,887.75

Finding the Fourth Proportional to 20,738.75, 31,108.13 and 6,887.75

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Solution

The fourth proportional to 20,738.75, 31,108.13 and 6,887.75 is: 10,331.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.75 : 31,108.13 = 6,887.75 : x
  2. Step 2: Convert to fraction form
    20,738.75/31,108.13 = 6,887.75/x
  3. Step 3: Cross multiply
    20,738.75x = 31,108.13 × 6,887.75
  4. Step 4: Simplify right side
    20,738.75x = 214,264,987.97
  5. Step 5: Solve for x
    x = 214,264,987.97/20,738.75
  6. Step 6: Final answer
    x = 10,331.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.