Home / 20,673.72-31,007.70-8,985.42

Finding the Fourth Proportional to 20,673.72, 31,007.70 and 8,985.42

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Solution

The fourth proportional to 20,673.72, 31,007.70 and 8,985.42 is: 13,476.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.72 : 31,007.70 = 8,985.42 : x
  2. Step 2: Convert to fraction form
    20,673.72/31,007.70 = 8,985.42/x
  3. Step 3: Cross multiply
    20,673.72x = 31,007.70 × 8,985.42
  4. Step 4: Simplify right side
    20,673.72x = 278,617,207.73
  5. Step 5: Solve for x
    x = 278,617,207.73/20,673.72
  6. Step 6: Final answer
    x = 13,476.88

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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.