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Finding the Fourth Proportional to 18,098.80, 27,123.90 and 12,898.60

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Solution

The fourth proportional to 18,098.80, 27,123.90 and 12,898.60 is: 19,330.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,098.80 : 27,123.90 = 12,898.60 : x
  2. Step 2: Convert to fraction form
    18,098.80/27,123.90 = 12,898.60/x
  3. Step 3: Cross multiply
    18,098.80x = 27,123.90 × 12,898.60
  4. Step 4: Simplify right side
    18,098.80x = 349,860,336.54
  5. Step 5: Solve for x
    x = 349,860,336.54/18,098.80
  6. Step 6: Final answer
    x = 19,330.58

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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.