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Finding the Fourth Proportional to 14,857.20, 20,503.08 and 8,143.08

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Solution

The fourth proportional to 14,857.20, 20,503.08 and 8,143.08 is: 11,237.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,857.20 : 20,503.08 = 8,143.08 : x
  2. Step 2: Convert to fraction form
    14,857.20/20,503.08 = 8,143.08/x
  3. Step 3: Cross multiply
    14,857.20x = 20,503.08 × 8,143.08
  4. Step 4: Simplify right side
    14,857.20x = 166,958,220.69
  5. Step 5: Solve for x
    x = 166,958,220.69/14,857.20
  6. Step 6: Final answer
    x = 11,237.53

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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.