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Finding the Fourth Proportional to 12,678.53, 18,998.04 and 11,355.09

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Solution

The fourth proportional to 12,678.53, 18,998.04 and 11,355.09 is: 17,014.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.53 : 18,998.04 = 11,355.09 : x
  2. Step 2: Convert to fraction form
    12,678.53/18,998.04 = 11,355.09/x
  3. Step 3: Cross multiply
    12,678.53x = 18,998.04 × 11,355.09
  4. Step 4: Simplify right side
    12,678.53x = 215,724,425.36
  5. Step 5: Solve for x
    x = 215,724,425.36/12,678.53
  6. Step 6: Final answer
    x = 17,014.95

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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.