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Finding the Fourth Proportional to 20,402.81, 30,604.18 and 11,514.11

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Solution

The fourth proportional to 20,402.81, 30,604.18 and 11,514.11 is: 17,271.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.81 : 30,604.18 = 11,514.11 : x
  2. Step 2: Convert to fraction form
    20,402.81/30,604.18 = 11,514.11/x
  3. Step 3: Cross multiply
    20,402.81x = 30,604.18 × 11,514.11
  4. Step 4: Simplify right side
    20,402.81x = 352,379,894.98
  5. Step 5: Solve for x
    x = 352,379,894.98/20,402.81
  6. Step 6: Final answer
    x = 17,271.15

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1.5x scale

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.