Home / 20,793.60-31,190.40-6,940.80

Finding the Fourth Proportional to 20,793.60, 31,190.40 and 6,940.80

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Solution

The fourth proportional to 20,793.60, 31,190.40 and 6,940.80 is: 10,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.60 : 31,190.40 = 6,940.80 : x
  2. Step 2: Convert to fraction form
    20,793.60/31,190.40 = 6,940.80/x
  3. Step 3: Cross multiply
    20,793.60x = 31,190.40 × 6,940.80
  4. Step 4: Simplify right side
    20,793.60x = 216,486,328.32
  5. Step 5: Solve for x
    x = 216,486,328.32/20,793.60
  6. Step 6: Final answer
    x = 10,411.20

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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.