Home / 20,871.56-31,305.96-9,780.73

Finding the Fourth Proportional to 20,871.56, 31,305.96 and 9,780.73

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Solution

The fourth proportional to 20,871.56, 31,305.96 and 9,780.73 is: 14,670.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.56 : 31,305.96 = 9,780.73 : x
  2. Step 2: Convert to fraction form
    20,871.56/31,305.96 = 9,780.73/x
  3. Step 3: Cross multiply
    20,871.56x = 31,305.96 × 9,780.73
  4. Step 4: Simplify right side
    20,871.56x = 306,195,063.89
  5. Step 5: Solve for x
    x = 306,195,063.89/20,871.56
  6. Step 6: Final answer
    x = 14,670.44

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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.