Home / 20,957.80-31,399.44-11,103.88

Finding the Fourth Proportional to 20,957.80, 31,399.44 and 11,103.88

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Solution

The fourth proportional to 20,957.80, 31,399.44 and 11,103.88 is: 16,636.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.80 : 31,399.44 = 11,103.88 : x
  2. Step 2: Convert to fraction form
    20,957.80/31,399.44 = 11,103.88/x
  3. Step 3: Cross multiply
    20,957.80x = 31,399.44 × 11,103.88
  4. Step 4: Simplify right side
    20,957.80x = 348,655,613.83
  5. Step 5: Solve for x
    x = 348,655,613.83/20,957.80
  6. Step 6: Final answer
    x = 16,636.08

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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.