Home / 21,811.85-32,717.90-7,772.42

Finding the Fourth Proportional to 21,811.85, 32,717.90 and 7,772.42

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Solution

The fourth proportional to 21,811.85, 32,717.90 and 7,772.42 is: 11,658.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,811.85 : 32,717.90 = 7,772.42 : x
  2. Step 2: Convert to fraction form
    21,811.85/32,717.90 = 7,772.42/x
  3. Step 3: Cross multiply
    21,811.85x = 32,717.90 × 7,772.42
  4. Step 4: Simplify right side
    21,811.85x = 254,297,209.71
  5. Step 5: Solve for x
    x = 254,297,209.71/21,811.85
  6. Step 6: Final answer
    x = 11,658.67

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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.