Home / 39,971.11-55,160.22-21,821.83

Finding the Fourth Proportional to 39,971.11, 55,160.22 and 21,821.83

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Solution

The fourth proportional to 39,971.11, 55,160.22 and 21,821.83 is: 30,114.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,971.11 : 55,160.22 = 21,821.83 : x
  2. Step 2: Convert to fraction form
    39,971.11/55,160.22 = 21,821.83/x
  3. Step 3: Cross multiply
    39,971.11x = 55,160.22 × 21,821.83
  4. Step 4: Simplify right side
    39,971.11x = 1,203,696,943.60
  5. Step 5: Solve for x
    x = 1,203,696,943.60/39,971.11
  6. Step 6: Final answer
    x = 30,114.17

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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.