Home / 20,764.13-31,145.90-9,664.61

Finding the Fourth Proportional to 20,764.13, 31,145.90 and 9,664.61

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Solution

The fourth proportional to 20,764.13, 31,145.90 and 9,664.61 is: 14,496.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.13 : 31,145.90 = 9,664.61 : x
  2. Step 2: Convert to fraction form
    20,764.13/31,145.90 = 9,664.61/x
  3. Step 3: Cross multiply
    20,764.13x = 31,145.90 × 9,664.61
  4. Step 4: Simplify right side
    20,764.13x = 301,012,772.55
  5. Step 5: Solve for x
    x = 301,012,772.55/20,764.13
  6. Step 6: Final answer
    x = 14,496.77

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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.