Home / 30,387.96-45,564.85-20,911.42

Finding the Fourth Proportional to 30,387.96, 45,564.85 and 20,911.42

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Solution

The fourth proportional to 30,387.96, 45,564.85 and 20,911.42 is: 31,355.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387.96 : 45,564.85 = 20,911.42 : x
  2. Step 2: Convert to fraction form
    30,387.96/45,564.85 = 20,911.42/x
  3. Step 3: Cross multiply
    30,387.96x = 45,564.85 × 20,911.42
  4. Step 4: Simplify right side
    30,387.96x = 952,825,424.75
  5. Step 5: Solve for x
    x = 952,825,424.75/30,387.96
  6. Step 6: Final answer
    x = 31,355.36

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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.