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Finding the Fourth Proportional to 12,911.93, 17,822.27 and 7,608.45

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Solution

The fourth proportional to 12,911.93, 17,822.27 and 7,608.45 is: 10,501.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.93 : 17,822.27 = 7,608.45 : x
  2. Step 2: Convert to fraction form
    12,911.93/17,822.27 = 7,608.45/x
  3. Step 3: Cross multiply
    12,911.93x = 17,822.27 × 7,608.45
  4. Step 4: Simplify right side
    12,911.93x = 135,599,869.20
  5. Step 5: Solve for x
    x = 135,599,869.20/12,911.93
  6. Step 6: Final answer
    x = 10,501.91

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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.