Home / 20,769.16-31,145.88-7,438.48

Finding the Fourth Proportional to 20,769.16, 31,145.88 and 7,438.48

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Solution

The fourth proportional to 20,769.16, 31,145.88 and 7,438.48 is: 11,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.16 : 31,145.88 = 7,438.48 : x
  2. Step 2: Convert to fraction form
    20,769.16/31,145.88 = 7,438.48/x
  3. Step 3: Cross multiply
    20,769.16x = 31,145.88 × 7,438.48
  4. Step 4: Simplify right side
    20,769.16x = 231,678,005.46
  5. Step 5: Solve for x
    x = 231,678,005.46/20,769.16
  6. Step 6: Final answer
    x = 11,154.90

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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.