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Finding the Fourth Proportional to 15,179.68, 20,941.92 and 9,209.16

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Solution

The fourth proportional to 15,179.68, 20,941.92 and 9,209.16 is: 12,704.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,179.68 : 20,941.92 = 9,209.16 : x
  2. Step 2: Convert to fraction form
    15,179.68/20,941.92 = 9,209.16/x
  3. Step 3: Cross multiply
    15,179.68x = 20,941.92 × 9,209.16
  4. Step 4: Simplify right side
    15,179.68x = 192,857,491.99
  5. Step 5: Solve for x
    x = 192,857,491.99/15,179.68
  6. Step 6: Final answer
    x = 12,704.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.