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Finding the Fourth Proportional to 11,762.13, 17,639.94 and 8,447.61

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Solution

The fourth proportional to 11,762.13, 17,639.94 and 8,447.61 is: 12,669.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,762.13 : 17,639.94 = 8,447.61 : x
  2. Step 2: Convert to fraction form
    11,762.13/17,639.94 = 8,447.61/x
  3. Step 3: Cross multiply
    11,762.13x = 17,639.94 × 8,447.61
  4. Step 4: Simplify right side
    11,762.13x = 149,015,333.54
  5. Step 5: Solve for x
    x = 149,015,333.54/11,762.13
  6. Step 6: Final answer
    x = 12,669.08

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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.