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Finding the Fourth Proportional to 18,848.80, 26,006.02 and 12,138.31

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Solution

The fourth proportional to 18,848.80, 26,006.02 and 12,138.31 is: 16,747.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,848.80 : 26,006.02 = 12,138.31 : x
  2. Step 2: Convert to fraction form
    18,848.80/26,006.02 = 12,138.31/x
  3. Step 3: Cross multiply
    18,848.80x = 26,006.02 × 12,138.31
  4. Step 4: Simplify right side
    18,848.80x = 315,669,037.27
  5. Step 5: Solve for x
    x = 315,669,037.27/18,848.80
  6. Step 6: Final answer
    x = 16,747.44

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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.