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Finding the Fourth Proportional to 12,911.94, 17,816.76 and 7,608.06

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Solution

The fourth proportional to 12,911.94, 17,816.76 and 7,608.06 is: 10,498.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.94 : 17,816.76 = 7,608.06 : x
  2. Step 2: Convert to fraction form
    12,911.94/17,816.76 = 7,608.06/x
  3. Step 3: Cross multiply
    12,911.94x = 17,816.76 × 7,608.06
  4. Step 4: Simplify right side
    12,911.94x = 135,550,979.09
  5. Step 5: Solve for x
    x = 135,550,979.09/12,911.94
  6. Step 6: Final answer
    x = 10,498.11

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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.