Home / 20,751.85-31,127.75-7,605.25

Finding the Fourth Proportional to 20,751.85, 31,127.75 and 7,605.25

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Solution

The fourth proportional to 20,751.85, 31,127.75 and 7,605.25 is: 11,407.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.85 : 31,127.75 = 7,605.25 : x
  2. Step 2: Convert to fraction form
    20,751.85/31,127.75 = 7,605.25/x
  3. Step 3: Cross multiply
    20,751.85x = 31,127.75 × 7,605.25
  4. Step 4: Simplify right side
    20,751.85x = 236,734,320.69
  5. Step 5: Solve for x
    x = 236,734,320.69/20,751.85
  6. Step 6: Final answer
    x = 11,407.87

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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.