Home / 20,953.82-31,450.47-7,639.69

Finding the Fourth Proportional to 20,953.82, 31,450.47 and 7,639.69

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Solution

The fourth proportional to 20,953.82, 31,450.47 and 7,639.69 is: 11,466.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.82 : 31,450.47 = 7,639.69 : x
  2. Step 2: Convert to fraction form
    20,953.82/31,450.47 = 7,639.69/x
  3. Step 3: Cross multiply
    20,953.82x = 31,450.47 × 7,639.69
  4. Step 4: Simplify right side
    20,953.82x = 240,271,683.90
  5. Step 5: Solve for x
    x = 240,271,683.90/20,953.82
  6. Step 6: Final answer
    x = 11,466.73

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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.