Home / 20,690.91-31,027.46-6,646.32

Finding the Fourth Proportional to 20,690.91, 31,027.46 and 6,646.32

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Solution

The fourth proportional to 20,690.91, 31,027.46 and 6,646.32 is: 9,966.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.91 : 31,027.46 = 6,646.32 : x
  2. Step 2: Convert to fraction form
    20,690.91/31,027.46 = 6,646.32/x
  3. Step 3: Cross multiply
    20,690.91x = 31,027.46 × 6,646.32
  4. Step 4: Simplify right side
    20,690.91x = 206,218,394.72
  5. Step 5: Solve for x
    x = 206,218,394.72/20,690.91
  6. Step 6: Final answer
    x = 9,966.62

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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.