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Finding the Fourth Proportional to 12,900.08, 17,800.98 and 8,118.44

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Solution

The fourth proportional to 12,900.08, 17,800.98 and 8,118.44 is: 11,202.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.08 : 17,800.98 = 8,118.44 : x
  2. Step 2: Convert to fraction form
    12,900.08/17,800.98 = 8,118.44/x
  3. Step 3: Cross multiply
    12,900.08x = 17,800.98 × 8,118.44
  4. Step 4: Simplify right side
    12,900.08x = 144,516,099.07
  5. Step 5: Solve for x
    x = 144,516,099.07/12,900.08
  6. Step 6: Final answer
    x = 11,202.73

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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.