Home / 20,630.45-30,939.86-6,400.26

Finding the Fourth Proportional to 20,630.45, 30,939.86 and 6,400.26

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Solution

The fourth proportional to 20,630.45, 30,939.86 and 6,400.26 is: 9,598.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.45 : 30,939.86 = 6,400.26 : x
  2. Step 2: Convert to fraction form
    20,630.45/30,939.86 = 6,400.26/x
  3. Step 3: Cross multiply
    20,630.45x = 30,939.86 × 6,400.26
  4. Step 4: Simplify right side
    20,630.45x = 198,023,164.36
  5. Step 5: Solve for x
    x = 198,023,164.36/20,630.45
  6. Step 6: Final answer
    x = 9,598.59

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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.