Home / 20,857.60-31,286.08-6,818.12

Finding the Fourth Proportional to 20,857.60, 31,286.08 and 6,818.12

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Solution

The fourth proportional to 20,857.60, 31,286.08 and 6,818.12 is: 10,227.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.60 : 31,286.08 = 6,818.12 : x
  2. Step 2: Convert to fraction form
    20,857.60/31,286.08 = 6,818.12/x
  3. Step 3: Cross multiply
    20,857.60x = 31,286.08 × 6,818.12
  4. Step 4: Simplify right side
    20,857.60x = 213,312,247.77
  5. Step 5: Solve for x
    x = 213,312,247.77/20,857.60
  6. Step 6: Final answer
    x = 10,227.08

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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.