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Finding the Fourth Proportional to 14,821.88, 20,454.78 and 8,107.79

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Solution

The fourth proportional to 14,821.88, 20,454.78 and 8,107.79 is: 11,189.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,821.88 : 20,454.78 = 8,107.79 : x
  2. Step 2: Convert to fraction form
    14,821.88/20,454.78 = 8,107.79/x
  3. Step 3: Cross multiply
    14,821.88x = 20,454.78 × 8,107.79
  4. Step 4: Simplify right side
    14,821.88x = 165,842,958.46
  5. Step 5: Solve for x
    x = 165,842,958.46/14,821.88
  6. Step 6: Final answer
    x = 11,189.07

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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.