Home / 20,122.86-30,159.81-8,422.38

Finding the Fourth Proportional to 20,122.86, 30,159.81 and 8,422.38

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Solution

The fourth proportional to 20,122.86, 30,159.81 and 8,422.38 is: 12,623.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.86 : 30,159.81 = 8,422.38 : x
  2. Step 2: Convert to fraction form
    20,122.86/30,159.81 = 8,422.38/x
  3. Step 3: Cross multiply
    20,122.86x = 30,159.81 × 8,422.38
  4. Step 4: Simplify right side
    20,122.86x = 254,017,380.55
  5. Step 5: Solve for x
    x = 254,017,380.55/20,122.86
  6. Step 6: Final answer
    x = 12,623.32

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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.