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Finding the Fourth Proportional to 20,402.65, 30,598.04 and 8,556.11

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Solution

The fourth proportional to 20,402.65, 30,598.04 and 8,556.11 is: 12,831.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.65 : 30,598.04 = 8,556.11 : x
  2. Step 2: Convert to fraction form
    20,402.65/30,598.04 = 8,556.11/x
  3. Step 3: Cross multiply
    20,402.65x = 30,598.04 × 8,556.11
  4. Step 4: Simplify right side
    20,402.65x = 261,800,179.17
  5. Step 5: Solve for x
    x = 261,800,179.17/20,402.65
  6. Step 6: Final answer
    x = 12,831.67

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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.