Home / 20,851.93-31,283.76-8,380.72

Finding the Fourth Proportional to 20,851.93, 31,283.76 and 8,380.72

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Solution

The fourth proportional to 20,851.93, 31,283.76 and 8,380.72 is: 12,573.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.93 : 31,283.76 = 8,380.72 : x
  2. Step 2: Convert to fraction form
    20,851.93/31,283.76 = 8,380.72/x
  3. Step 3: Cross multiply
    20,851.93x = 31,283.76 × 8,380.72
  4. Step 4: Simplify right side
    20,851.93x = 262,180,433.11
  5. Step 5: Solve for x
    x = 262,180,433.11/20,851.93
  6. Step 6: Final answer
    x = 12,573.44

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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.