Home / 20,851.63-31,281.39-8,372.63

Finding the Fourth Proportional to 20,851.63, 31,281.39 and 8,372.63

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Solution

The fourth proportional to 20,851.63, 31,281.39 and 8,372.63 is: 12,560.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.63 : 31,281.39 = 8,372.63 : x
  2. Step 2: Convert to fraction form
    20,851.63/31,281.39 = 8,372.63/x
  3. Step 3: Cross multiply
    20,851.63x = 31,281.39 × 8,372.63
  4. Step 4: Simplify right side
    20,851.63x = 261,907,582.56
  5. Step 5: Solve for x
    x = 261,907,582.56/20,851.63
  6. Step 6: Final answer
    x = 12,560.53

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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.