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Finding the Fourth Proportional to 15,481.22, 21,363.99 and 8,407.58

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Solution

The fourth proportional to 15,481.22, 21,363.99 and 8,407.58 is: 11,602.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,481.22 : 21,363.99 = 8,407.58 : x
  2. Step 2: Convert to fraction form
    15,481.22/21,363.99 = 8,407.58/x
  3. Step 3: Cross multiply
    15,481.22x = 21,363.99 × 8,407.58
  4. Step 4: Simplify right side
    15,481.22x = 179,619,455.04
  5. Step 5: Solve for x
    x = 179,619,455.04/15,481.22
  6. Step 6: Final answer
    x = 11,602.41

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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.