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Finding the Fourth Proportional to 20,501.98, 30,729.07 and 9,409.84

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Solution

The fourth proportional to 20,501.98, 30,729.07 and 9,409.84 is: 14,103.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,501.98 : 30,729.07 = 9,409.84 : x
  2. Step 2: Convert to fraction form
    20,501.98/30,729.07 = 9,409.84/x
  3. Step 3: Cross multiply
    20,501.98x = 30,729.07 × 9,409.84
  4. Step 4: Simplify right side
    20,501.98x = 289,155,632.05
  5. Step 5: Solve for x
    x = 289,155,632.05/20,501.98
  6. Step 6: Final answer
    x = 14,103.79

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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.