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Finding the Fourth Proportional to 29,679.39, 40,977.60 and 18,930.27

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Solution

The fourth proportional to 29,679.39, 40,977.60 and 18,930.27 is: 26,136.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,679.39 : 40,977.60 = 18,930.27 : x
  2. Step 2: Convert to fraction form
    29,679.39/40,977.60 = 18,930.27/x
  3. Step 3: Cross multiply
    29,679.39x = 40,977.60 × 18,930.27
  4. Step 4: Simplify right side
    29,679.39x = 775,717,031.95
  5. Step 5: Solve for x
    x = 775,717,031.95/29,679.39
  6. Step 6: Final answer
    x = 26,136.56

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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.