Home / 39,861.13-55,006.33-21,955.75

Finding the Fourth Proportional to 39,861.13, 55,006.33 and 21,955.75

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Solution

The fourth proportional to 39,861.13, 55,006.33 and 21,955.75 is: 30,297.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.13 : 55,006.33 = 21,955.75 : x
  2. Step 2: Convert to fraction form
    39,861.13/55,006.33 = 21,955.75/x
  3. Step 3: Cross multiply
    39,861.13x = 55,006.33 × 21,955.75
  4. Step 4: Simplify right side
    39,861.13x = 1,207,705,229.90
  5. Step 5: Solve for x
    x = 1,207,705,229.90/39,861.13
  6. Step 6: Final answer
    x = 30,297.82

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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.