Home / 20,219.10-30,328.65-7,072.80

Finding the Fourth Proportional to 20,219.10, 30,328.65 and 7,072.80

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Solution

The fourth proportional to 20,219.10, 30,328.65 and 7,072.80 is: 10,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.10 : 30,328.65 = 7,072.80 : x
  2. Step 2: Convert to fraction form
    20,219.10/30,328.65 = 7,072.80/x
  3. Step 3: Cross multiply
    20,219.10x = 30,328.65 × 7,072.80
  4. Step 4: Simplify right side
    20,219.10x = 214,508,475.72
  5. Step 5: Solve for x
    x = 214,508,475.72/20,219.10
  6. Step 6: Final answer
    x = 10,609.20

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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.