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Finding the Fourth Proportional to 17,785.42, 26,659.68 and 7,929.34

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Solution

The fourth proportional to 17,785.42, 26,659.68 and 7,929.34 is: 11,885.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,785.42 : 26,659.68 = 7,929.34 : x
  2. Step 2: Convert to fraction form
    17,785.42/26,659.68 = 7,929.34/x
  3. Step 3: Cross multiply
    17,785.42x = 26,659.68 × 7,929.34
  4. Step 4: Simplify right side
    17,785.42x = 211,393,667.01
  5. Step 5: Solve for x
    x = 211,393,667.01/17,785.42
  6. Step 6: Final answer
    x = 11,885.78

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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.