Home / 39,863.84-55,012.10-21,958.79

Finding the Fourth Proportional to 39,863.84, 55,012.10 and 21,958.79

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Solution

The fourth proportional to 39,863.84, 55,012.10 and 21,958.79 is: 30,303.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,863.84 : 55,012.10 = 21,958.79 : x
  2. Step 2: Convert to fraction form
    39,863.84/55,012.10 = 21,958.79/x
  3. Step 3: Cross multiply
    39,863.84x = 55,012.10 × 21,958.79
  4. Step 4: Simplify right side
    39,863.84x = 1,207,998,766.50
  5. Step 5: Solve for x
    x = 1,207,998,766.50/39,863.84
  6. Step 6: Final answer
    x = 30,303.12

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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.