Home / 20,818.55-31,222.62-8,170.87

Finding the Fourth Proportional to 20,818.55, 31,222.62 and 8,170.87

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Solution

The fourth proportional to 20,818.55, 31,222.62 and 8,170.87 is: 12,254.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.55 : 31,222.62 = 8,170.87 : x
  2. Step 2: Convert to fraction form
    20,818.55/31,222.62 = 8,170.87/x
  3. Step 3: Cross multiply
    20,818.55x = 31,222.62 × 8,170.87
  4. Step 4: Simplify right side
    20,818.55x = 255,115,969.08
  5. Step 5: Solve for x
    x = 255,115,969.08/20,818.55
  6. Step 6: Final answer
    x = 12,254.26

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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.