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Finding the Fourth Proportional to 17,939.64, 26,923.50 and 12,431.64

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Solution

The fourth proportional to 17,939.64, 26,923.50 and 12,431.64 is: 18,657.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,939.64 : 26,923.50 = 12,431.64 : x
  2. Step 2: Convert to fraction form
    17,939.64/26,923.50 = 12,431.64/x
  3. Step 3: Cross multiply
    17,939.64x = 26,923.50 × 12,431.64
  4. Step 4: Simplify right side
    17,939.64x = 334,703,259.54
  5. Step 5: Solve for x
    x = 334,703,259.54/17,939.64
  6. Step 6: Final answer
    x = 18,657.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.