Home / 20,622.66-30,937.26-8,142.72

Finding the Fourth Proportional to 20,622.66, 30,937.26 and 8,142.72

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Solution

The fourth proportional to 20,622.66, 30,937.26 and 8,142.72 is: 12,215.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.66 : 30,937.26 = 8,142.72 : x
  2. Step 2: Convert to fraction form
    20,622.66/30,937.26 = 8,142.72/x
  3. Step 3: Cross multiply
    20,622.66x = 30,937.26 × 8,142.72
  4. Step 4: Simplify right side
    20,622.66x = 251,913,445.75
  5. Step 5: Solve for x
    x = 251,913,445.75/20,622.66
  6. Step 6: Final answer
    x = 12,215.37

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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.