Home / 20,630.20-30,939.48-6,400

Finding the Fourth Proportional to 20,630.20, 30,939.48 and 6,400

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Solution

The fourth proportional to 20,630.20, 30,939.48 and 6,400 is: 9,598.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.20 : 30,939.48 = 6,400 : x
  2. Step 2: Convert to fraction form
    20,630.20/30,939.48 = 6,400/x
  3. Step 3: Cross multiply
    20,630.20x = 30,939.48 × 6,400
  4. Step 4: Simplify right side
    20,630.20x = 198,012,672
  5. Step 5: Solve for x
    x = 198,012,672/20,630.20
  6. Step 6: Final answer
    x = 9,598.19

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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.