Home / 28,502.97-42,716.79-20,631.80

Finding the Fourth Proportional to 28,502.97, 42,716.79 and 20,631.80

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Solution

The fourth proportional to 28,502.97, 42,716.79 and 20,631.80 is: 30,920.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,502.97 : 42,716.79 = 20,631.80 : x
  2. Step 2: Convert to fraction form
    28,502.97/42,716.79 = 20,631.80/x
  3. Step 3: Cross multiply
    28,502.97x = 42,716.79 × 20,631.80
  4. Step 4: Simplify right side
    28,502.97x = 881,324,054.34
  5. Step 5: Solve for x
    x = 881,324,054.34/28,502.97
  6. Step 6: Final answer
    x = 30,920.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.