Home / 20,940.73-28,890.23-15,502.75

Finding the Fourth Proportional to 20,940.73, 28,890.23 and 15,502.75

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Solution

The fourth proportional to 20,940.73, 28,890.23 and 15,502.75 is: 21,387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.73 : 28,890.23 = 15,502.75 : x
  2. Step 2: Convert to fraction form
    20,940.73/28,890.23 = 15,502.75/x
  3. Step 3: Cross multiply
    20,940.73x = 28,890.23 × 15,502.75
  4. Step 4: Simplify right side
    20,940.73x = 447,877,863.39
  5. Step 5: Solve for x
    x = 447,877,863.39/20,940.73
  6. Step 6: Final answer
    x = 21,387.88

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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.