Home / 20,389.20-30,584.50-7,242.60

Finding the Fourth Proportional to 20,389.20, 30,584.50 and 7,242.60

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Solution

The fourth proportional to 20,389.20, 30,584.50 and 7,242.60 is: 10,864.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.20 : 30,584.50 = 7,242.60 : x
  2. Step 2: Convert to fraction form
    20,389.20/30,584.50 = 7,242.60/x
  3. Step 3: Cross multiply
    20,389.20x = 30,584.50 × 7,242.60
  4. Step 4: Simplify right side
    20,389.20x = 221,511,299.70
  5. Step 5: Solve for x
    x = 221,511,299.70/20,389.20
  6. Step 6: Final answer
    x = 10,864.15

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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.