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Finding the Fourth Proportional to 14,821.76, 20,454.54 and 8,107.82

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Solution

The fourth proportional to 14,821.76, 20,454.54 and 8,107.82 is: 11,189.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,821.76 : 20,454.54 = 8,107.82 : x
  2. Step 2: Convert to fraction form
    14,821.76/20,454.54 = 8,107.82/x
  3. Step 3: Cross multiply
    14,821.76x = 20,454.54 × 8,107.82
  4. Step 4: Simplify right side
    14,821.76x = 165,841,728.50
  5. Step 5: Solve for x
    x = 165,841,728.50/14,821.76
  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.