Home / 20,682.90-31,032.45-8,200.80

Finding the Fourth Proportional to 20,682.90, 31,032.45 and 8,200.80

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Solution

The fourth proportional to 20,682.90, 31,032.45 and 8,200.80 is: 12,304.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.90 : 31,032.45 = 8,200.80 : x
  2. Step 2: Convert to fraction form
    20,682.90/31,032.45 = 8,200.80/x
  3. Step 3: Cross multiply
    20,682.90x = 31,032.45 × 8,200.80
  4. Step 4: Simplify right side
    20,682.90x = 254,490,915.96
  5. Step 5: Solve for x
    x = 254,490,915.96/20,682.90
  6. Step 6: Final answer
    x = 12,304.41

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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.