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Finding the Fourth Proportional to 12,988.22, 17,923.39 and 7,322.92

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Solution

The fourth proportional to 12,988.22, 17,923.39 and 7,322.92 is: 10,105.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.22 : 17,923.39 = 7,322.92 : x
  2. Step 2: Convert to fraction form
    12,988.22/17,923.39 = 7,322.92/x
  3. Step 3: Cross multiply
    12,988.22x = 17,923.39 × 7,322.92
  4. Step 4: Simplify right side
    12,988.22x = 131,251,561.29
  5. Step 5: Solve for x
    x = 131,251,561.29/12,988.22
  6. Step 6: Final answer
    x = 10,105.43

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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.