Home / 20,818.08-31,270.05-19,919.79

Finding the Fourth Proportional to 20,818.08, 31,270.05 and 19,919.79

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Solution

The fourth proportional to 20,818.08, 31,270.05 and 19,919.79 is: 29,920.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.08 : 31,270.05 = 19,919.79 : x
  2. Step 2: Convert to fraction form
    20,818.08/31,270.05 = 19,919.79/x
  3. Step 3: Cross multiply
    20,818.08x = 31,270.05 × 19,919.79
  4. Step 4: Simplify right side
    20,818.08x = 622,892,829.29
  5. Step 5: Solve for x
    x = 622,892,829.29/20,818.08
  6. Step 6: Final answer
    x = 29,920.76

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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.