Home / 20,860.38-31,289.57-6,818.63

Finding the Fourth Proportional to 20,860.38, 31,289.57 and 6,818.63

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Solution

The fourth proportional to 20,860.38, 31,289.57 and 6,818.63 is: 10,227.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.38 : 31,289.57 = 6,818.63 : x
  2. Step 2: Convert to fraction form
    20,860.38/31,289.57 = 6,818.63/x
  3. Step 3: Cross multiply
    20,860.38x = 31,289.57 × 6,818.63
  4. Step 4: Simplify right side
    20,860.38x = 213,351,810.15
  5. Step 5: Solve for x
    x = 213,351,810.15/20,860.38
  6. Step 6: Final answer
    x = 10,227.61

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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.