Home / 30,965.97-42,736.68-18,390.72

Finding the Fourth Proportional to 30,965.97, 42,736.68 and 18,390.72

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Solution

The fourth proportional to 30,965.97, 42,736.68 and 18,390.72 is: 25,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,965.97 : 42,736.68 = 18,390.72 : x
  2. Step 2: Convert to fraction form
    30,965.97/42,736.68 = 18,390.72/x
  3. Step 3: Cross multiply
    30,965.97x = 42,736.68 × 18,390.72
  4. Step 4: Simplify right side
    30,965.97x = 785,958,315.61
  5. Step 5: Solve for x
    x = 785,958,315.61/30,965.97
  6. Step 6: Final answer
    x = 25,381.36

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Similar ratio
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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.