Home / 20,107.90-30,161.85-16,851.70

Finding the Fourth Proportional to 20,107.90, 30,161.85 and 16,851.70

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Solution

The fourth proportional to 20,107.90, 30,161.85 and 16,851.70 is: 25,277.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.90 : 30,161.85 = 16,851.70 : x
  2. Step 2: Convert to fraction form
    20,107.90/30,161.85 = 16,851.70/x
  3. Step 3: Cross multiply
    20,107.90x = 30,161.85 × 16,851.70
  4. Step 4: Simplify right side
    20,107.90x = 508,278,447.65
  5. Step 5: Solve for x
    x = 508,278,447.65/20,107.90
  6. Step 6: Final answer
    x = 25,277.55

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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.