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Finding the Fourth Proportional to 15,296.92, 21,110.86 and 8,491.30

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Solution

The fourth proportional to 15,296.92, 21,110.86 and 8,491.30 is: 11,718.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,296.92 : 21,110.86 = 8,491.30 : x
  2. Step 2: Convert to fraction form
    15,296.92/21,110.86 = 8,491.30/x
  3. Step 3: Cross multiply
    15,296.92x = 21,110.86 × 8,491.30
  4. Step 4: Simplify right side
    15,296.92x = 179,258,645.52
  5. Step 5: Solve for x
    x = 179,258,645.52/15,296.92
  6. Step 6: Final answer
    x = 11,718.61

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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.