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Finding the Fourth Proportional to 12,392.29, 17,103.23 and 7,919.02

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Solution

The fourth proportional to 12,392.29, 17,103.23 and 7,919.02 is: 10,929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.29 : 17,103.23 = 7,919.02 : x
  2. Step 2: Convert to fraction form
    12,392.29/17,103.23 = 7,919.02/x
  3. Step 3: Cross multiply
    12,392.29x = 17,103.23 × 7,919.02
  4. Step 4: Simplify right side
    12,392.29x = 135,440,820.43
  5. Step 5: Solve for x
    x = 135,440,820.43/12,392.29
  6. Step 6: Final answer
    x = 10,929.44

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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.