Home / 30,220.94-41,691.48-20,139.56

Finding the Fourth Proportional to 30,220.94, 41,691.48 and 20,139.56

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Solution

The fourth proportional to 30,220.94, 41,691.48 and 20,139.56 is: 27,783.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,220.94 : 41,691.48 = 20,139.56 : x
  2. Step 2: Convert to fraction form
    30,220.94/41,691.48 = 20,139.56/x
  3. Step 3: Cross multiply
    30,220.94x = 41,691.48 × 20,139.56
  4. Step 4: Simplify right side
    30,220.94x = 839,648,062.95
  5. Step 5: Solve for x
    x = 839,648,062.95/30,220.94
  6. Step 6: Final answer
    x = 27,783.65

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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.