Home / 20,998.72-31,488.88-11,135.76

Finding the Fourth Proportional to 20,998.72, 31,488.88 and 11,135.76

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Solution

The fourth proportional to 20,998.72, 31,488.88 and 11,135.76 is: 16,698.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.72 : 31,488.88 = 11,135.76 : x
  2. Step 2: Convert to fraction form
    20,998.72/31,488.88 = 11,135.76/x
  3. Step 3: Cross multiply
    20,998.72x = 31,488.88 × 11,135.76
  4. Step 4: Simplify right side
    20,998.72x = 350,652,610.35
  5. Step 5: Solve for x
    x = 350,652,610.35/20,998.72
  6. Step 6: Final answer
    x = 16,698.76

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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.