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Finding the Fourth Proportional to 14,885.92, 20,542.84 and 8,172.18

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Solution

The fourth proportional to 14,885.92, 20,542.84 and 8,172.18 is: 11,277.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,885.92 : 20,542.84 = 8,172.18 : x
  2. Step 2: Convert to fraction form
    14,885.92/20,542.84 = 8,172.18/x
  3. Step 3: Cross multiply
    14,885.92x = 20,542.84 × 8,172.18
  4. Step 4: Simplify right side
    14,885.92x = 167,879,786.19
  5. Step 5: Solve for x
    x = 167,879,786.19/14,885.92
  6. Step 6: Final answer
    x = 11,277.76

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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.