Home / 20,785.54-31,162-9,690.76

Finding the Fourth Proportional to 20,785.54, 31,162 and 9,690.76

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Solution

The fourth proportional to 20,785.54, 31,162 and 9,690.76 is: 14,528.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.54 : 31,162 = 9,690.76 : x
  2. Step 2: Convert to fraction form
    20,785.54/31,162 = 9,690.76/x
  3. Step 3: Cross multiply
    20,785.54x = 31,162 × 9,690.76
  4. Step 4: Simplify right side
    20,785.54x = 301,983,463.12
  5. Step 5: Solve for x
    x = 301,983,463.12/20,785.54
  6. Step 6: Final answer
    x = 14,528.54

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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.