Home / 20,779.92-31,172.64-7,632.48

Finding the Fourth Proportional to 20,779.92, 31,172.64 and 7,632.48

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Solution

The fourth proportional to 20,779.92, 31,172.64 and 7,632.48 is: 11,449.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.92 : 31,172.64 = 7,632.48 : x
  2. Step 2: Convert to fraction form
    20,779.92/31,172.64 = 7,632.48/x
  3. Step 3: Cross multiply
    20,779.92x = 31,172.64 × 7,632.48
  4. Step 4: Simplify right side
    20,779.92x = 237,924,551.35
  5. Step 5: Solve for x
    x = 237,924,551.35/20,779.92
  6. Step 6: Final answer
    x = 11,449.73

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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.