Home / 20,910.75-31,376.88-13,895.61

Finding the Fourth Proportional to 20,910.75, 31,376.88 and 13,895.61

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Solution

The fourth proportional to 20,910.75, 31,376.88 and 13,895.61 is: 20,850.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.75 : 31,376.88 = 13,895.61 : x
  2. Step 2: Convert to fraction form
    20,910.75/31,376.88 = 13,895.61/x
  3. Step 3: Cross multiply
    20,910.75x = 31,376.88 × 13,895.61
  4. Step 4: Simplify right side
    20,910.75x = 436,000,887.50
  5. Step 5: Solve for x
    x = 436,000,887.50/20,910.75
  6. Step 6: Final answer
    x = 20,850.56

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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.