Home / 20,849.96-31,289.52-9,171.36

Finding the Fourth Proportional to 20,849.96, 31,289.52 and 9,171.36

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Solution

The fourth proportional to 20,849.96, 31,289.52 and 9,171.36 is: 13,763.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,849.96 : 31,289.52 = 9,171.36 : x
  2. Step 2: Convert to fraction form
    20,849.96/31,289.52 = 9,171.36/x
  3. Step 3: Cross multiply
    20,849.96x = 31,289.52 × 9,171.36
  4. Step 4: Simplify right side
    20,849.96x = 286,967,452.15
  5. Step 5: Solve for x
    x = 286,967,452.15/20,849.96
  6. Step 6: Final answer
    x = 13,763.45

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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.