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Finding the Fourth Proportional to 8,447.58, 12,665.99 and 7,409.66

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Solution

The fourth proportional to 8,447.58, 12,665.99 and 7,409.66 is: 11,109.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.58 : 12,665.99 = 7,409.66 : x
  2. Step 2: Convert to fraction form
    8,447.58/12,665.99 = 7,409.66/x
  3. Step 3: Cross multiply
    8,447.58x = 12,665.99 × 7,409.66
  4. Step 4: Simplify right side
    8,447.58x = 93,850,579.09
  5. Step 5: Solve for x
    x = 93,850,579.09/8,447.58
  6. Step 6: Final answer
    x = 11,109.76

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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.