Home / 20,738.57-30,975.65-18,761.15

Finding the Fourth Proportional to 20,738.57, 30,975.65 and 18,761.15

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Solution

The fourth proportional to 20,738.57, 30,975.65 and 18,761.15 is: 28,022.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.57 : 30,975.65 = 18,761.15 : x
  2. Step 2: Convert to fraction form
    20,738.57/30,975.65 = 18,761.15/x
  3. Step 3: Cross multiply
    20,738.57x = 30,975.65 × 18,761.15
  4. Step 4: Simplify right side
    20,738.57x = 581,138,567.31
  5. Step 5: Solve for x
    x = 581,138,567.31/20,738.57
  6. Step 6: Final answer
    x = 28,022.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.