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Finding the Fourth Proportional to 12,398.40, 18,600.84 and 7,199.82

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Solution

The fourth proportional to 12,398.40, 18,600.84 and 7,199.82 is: 10,801.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.40 : 18,600.84 = 7,199.82 : x
  2. Step 2: Convert to fraction form
    12,398.40/18,600.84 = 7,199.82/x
  3. Step 3: Cross multiply
    12,398.40x = 18,600.84 × 7,199.82
  4. Step 4: Simplify right side
    12,398.40x = 133,922,699.85
  5. Step 5: Solve for x
    x = 133,922,699.85/12,398.40
  6. Step 6: Final answer
    x = 10,801.61

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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.