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Finding the Fourth Proportional to 11,721.60, 17,481.60 and 9,849.60

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Solution

The fourth proportional to 11,721.60, 17,481.60 and 9,849.60 is: 14,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.60 : 17,481.60 = 9,849.60 : x
  2. Step 2: Convert to fraction form
    11,721.60/17,481.60 = 9,849.60/x
  3. Step 3: Cross multiply
    11,721.60x = 17,481.60 × 9,849.60
  4. Step 4: Simplify right side
    11,721.60x = 172,186,767.36
  5. Step 5: Solve for x
    x = 172,186,767.36/11,721.60
  6. Step 6: Final answer
    x = 14,689.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.