Home / 20,957.86-31,438.84-7,634.48

Finding the Fourth Proportional to 20,957.86, 31,438.84 and 7,634.48

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Solution

The fourth proportional to 20,957.86, 31,438.84 and 7,634.48 is: 11,452.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.86 : 31,438.84 = 7,634.48 : x
  2. Step 2: Convert to fraction form
    20,957.86/31,438.84 = 7,634.48/x
  3. Step 3: Cross multiply
    20,957.86x = 31,438.84 × 7,634.48
  4. Step 4: Simplify right side
    20,957.86x = 240,019,057.10
  5. Step 5: Solve for x
    x = 240,019,057.10/20,957.86
  6. Step 6: Final answer
    x = 11,452.46

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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.