Home / 20,690.80-31,039.27-9,598.61

Finding the Fourth Proportional to 20,690.80, 31,039.27 and 9,598.61

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Solution

The fourth proportional to 20,690.80, 31,039.27 and 9,598.61 is: 14,399.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.80 : 31,039.27 = 9,598.61 : x
  2. Step 2: Convert to fraction form
    20,690.80/31,039.27 = 9,598.61/x
  3. Step 3: Cross multiply
    20,690.80x = 31,039.27 × 9,598.61
  4. Step 4: Simplify right side
    20,690.80x = 297,933,847.41
  5. Step 5: Solve for x
    x = 297,933,847.41/20,690.80
  6. Step 6: Final answer
    x = 14,399.34

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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.