Home / 40,107.79-55,349.41-21,958.21

Finding the Fourth Proportional to 40,107.79, 55,349.41 and 21,958.21

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Solution

The fourth proportional to 40,107.79, 55,349.41 and 21,958.21 is: 30,302.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,107.79 : 55,349.41 = 21,958.21 : x
  2. Step 2: Convert to fraction form
    40,107.79/55,349.41 = 21,958.21/x
  3. Step 3: Cross multiply
    40,107.79x = 55,349.41 × 21,958.21
  4. Step 4: Simplify right side
    40,107.79x = 1,215,373,789.18
  5. Step 5: Solve for x
    x = 1,215,373,789.18/40,107.79
  6. Step 6: Final answer
    x = 30,302.69

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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.