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Finding the Fourth Proportional to 12,601.78, 18,900.14 and 11,977.30

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Solution

The fourth proportional to 12,601.78, 18,900.14 and 11,977.30 is: 17,963.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,601.78 : 18,900.14 = 11,977.30 : x
  2. Step 2: Convert to fraction form
    12,601.78/18,900.14 = 11,977.30/x
  3. Step 3: Cross multiply
    12,601.78x = 18,900.14 × 11,977.30
  4. Step 4: Simplify right side
    12,601.78x = 226,372,646.82
  5. Step 5: Solve for x
    x = 226,372,646.82/12,601.78
  6. Step 6: Final answer
    x = 17,963.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.