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Finding the Fourth Proportional to 12,965.43, 17,887.44 and 8,491.68

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Solution

The fourth proportional to 12,965.43, 17,887.44 and 8,491.68 is: 11,715.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,965.43 : 17,887.44 = 8,491.68 : x
  2. Step 2: Convert to fraction form
    12,965.43/17,887.44 = 8,491.68/x
  3. Step 3: Cross multiply
    12,965.43x = 17,887.44 × 8,491.68
  4. Step 4: Simplify right side
    12,965.43x = 151,894,416.50
  5. Step 5: Solve for x
    x = 151,894,416.50/12,965.43
  6. Step 6: Final answer
    x = 11,715.34

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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.