Home / 20,117.80-30,180.06-8,431.90

Finding the Fourth Proportional to 20,117.80, 30,180.06 and 8,431.90

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Solution

The fourth proportional to 20,117.80, 30,180.06 and 8,431.90 is: 12,649.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.80 : 30,180.06 = 8,431.90 : x
  2. Step 2: Convert to fraction form
    20,117.80/30,180.06 = 8,431.90/x
  3. Step 3: Cross multiply
    20,117.80x = 30,180.06 × 8,431.90
  4. Step 4: Simplify right side
    20,117.80x = 254,475,247.91
  5. Step 5: Solve for x
    x = 254,475,247.91/20,117.80
  6. Step 6: Final answer
    x = 12,649.26

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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.