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Finding the Fourth Proportional to 15,481.17, 21,363.99 and 8,407.59

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Solution

The fourth proportional to 15,481.17, 21,363.99 and 8,407.59 is: 11,602.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,481.17 : 21,363.99 = 8,407.59 : x
  2. Step 2: Convert to fraction form
    15,481.17/21,363.99 = 8,407.59/x
  3. Step 3: Cross multiply
    15,481.17x = 21,363.99 × 8,407.59
  4. Step 4: Simplify right side
    15,481.17x = 179,619,668.68
  5. Step 5: Solve for x
    x = 179,619,668.68/15,481.17
  6. Step 6: Final answer
    x = 11,602.46

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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.