Home / 40,140.49-55,394.34-21,991.69

Finding the Fourth Proportional to 40,140.49, 55,394.34 and 21,991.69

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Solution

The fourth proportional to 40,140.49, 55,394.34 and 21,991.69 is: 30,348.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,140.49 : 55,394.34 = 21,991.69 : x
  2. Step 2: Convert to fraction form
    40,140.49/55,394.34 = 21,991.69/x
  3. Step 3: Cross multiply
    40,140.49x = 55,394.34 × 21,991.69
  4. Step 4: Simplify right side
    40,140.49x = 1,218,215,153.03
  5. Step 5: Solve for x
    x = 1,218,215,153.03/40,140.49
  6. Step 6: Final answer
    x = 30,348.79

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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.