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Finding the Fourth Proportional to 20,573.80, 30,860.70 and 6,722.80

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Solution

The fourth proportional to 20,573.80, 30,860.70 and 6,722.80 is: 10,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.80 : 30,860.70 = 6,722.80 : x
  2. Step 2: Convert to fraction form
    20,573.80/30,860.70 = 6,722.80/x
  3. Step 3: Cross multiply
    20,573.80x = 30,860.70 × 6,722.80
  4. Step 4: Simplify right side
    20,573.80x = 207,470,313.96
  5. Step 5: Solve for x
    x = 207,470,313.96/20,573.80
  6. Step 6: Final answer
    x = 10,084.20

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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.