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Finding the Fourth Proportional to 14,815.82, 20,445.01 and 8,100.11

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Solution

The fourth proportional to 14,815.82, 20,445.01 and 8,100.11 is: 11,177.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,815.82 : 20,445.01 = 8,100.11 : x
  2. Step 2: Convert to fraction form
    14,815.82/20,445.01 = 8,100.11/x
  3. Step 3: Cross multiply
    14,815.82x = 20,445.01 × 8,100.11
  4. Step 4: Simplify right side
    14,815.82x = 165,606,860.81
  5. Step 5: Solve for x
    x = 165,606,860.81/14,815.82
  6. Step 6: Final answer
    x = 11,177.70

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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.