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Finding the Fourth Proportional to 11,215.63, 16,805.48 and 8,579.94

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Solution

The fourth proportional to 11,215.63, 16,805.48 and 8,579.94 is: 12,856.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,215.63 : 16,805.48 = 8,579.94 : x
  2. Step 2: Convert to fraction form
    11,215.63/16,805.48 = 8,579.94/x
  3. Step 3: Cross multiply
    11,215.63x = 16,805.48 × 8,579.94
  4. Step 4: Simplify right side
    11,215.63x = 144,189,967.17
  5. Step 5: Solve for x
    x = 144,189,967.17/11,215.63
  6. Step 6: Final answer
    x = 12,856.17

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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.