Home / 20,676.20-31,014.30-11,903.90

Finding the Fourth Proportional to 20,676.20, 31,014.30 and 11,903.90

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Solution

The fourth proportional to 20,676.20, 31,014.30 and 11,903.90 is: 17,855.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.20 : 31,014.30 = 11,903.90 : x
  2. Step 2: Convert to fraction form
    20,676.20/31,014.30 = 11,903.90/x
  3. Step 3: Cross multiply
    20,676.20x = 31,014.30 × 11,903.90
  4. Step 4: Simplify right side
    20,676.20x = 369,191,125.77
  5. Step 5: Solve for x
    x = 369,191,125.77/20,676.20
  6. Step 6: Final answer
    x = 17,855.85

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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.