Home / 20,777.06-31,148.24-9,678.03

Finding the Fourth Proportional to 20,777.06, 31,148.24 and 9,678.03

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Solution

The fourth proportional to 20,777.06, 31,148.24 and 9,678.03 is: 14,508.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.06 : 31,148.24 = 9,678.03 : x
  2. Step 2: Convert to fraction form
    20,777.06/31,148.24 = 9,678.03/x
  3. Step 3: Cross multiply
    20,777.06x = 31,148.24 × 9,678.03
  4. Step 4: Simplify right side
    20,777.06x = 301,453,552.78
  5. Step 5: Solve for x
    x = 301,453,552.78/20,777.06
  6. Step 6: Final answer
    x = 14,508.96

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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.