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Finding the Fourth Proportional to 18,677.42, 27,808.77 and 18,415.90

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Solution

The fourth proportional to 18,677.42, 27,808.77 and 18,415.90 is: 27,419.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.42 : 27,808.77 = 18,415.90 : x
  2. Step 2: Convert to fraction form
    18,677.42/27,808.77 = 18,415.90/x
  3. Step 3: Cross multiply
    18,677.42x = 27,808.77 × 18,415.90
  4. Step 4: Simplify right side
    18,677.42x = 512,123,527.44
  5. Step 5: Solve for x
    x = 512,123,527.44/18,677.42
  6. Step 6: Final answer
    x = 27,419.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.