Home / 20,766.65-31,131.44-7,615.96

Finding the Fourth Proportional to 20,766.65, 31,131.44 and 7,615.96

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Solution

The fourth proportional to 20,766.65, 31,131.44 and 7,615.96 is: 11,417.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.65 : 31,131.44 = 7,615.96 : x
  2. Step 2: Convert to fraction form
    20,766.65/31,131.44 = 7,615.96/x
  3. Step 3: Cross multiply
    20,766.65x = 31,131.44 × 7,615.96
  4. Step 4: Simplify right side
    20,766.65x = 237,095,714.43
  5. Step 5: Solve for x
    x = 237,095,714.43/20,766.65
  6. Step 6: Final answer
    x = 11,417.14

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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.