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Finding the Fourth Proportional to 12,392.12, 17,096.96 and 7,918.49

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Solution

The fourth proportional to 12,392.12, 17,096.96 and 7,918.49 is: 10,924.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.12 : 17,096.96 = 7,918.49 : x
  2. Step 2: Convert to fraction form
    12,392.12/17,096.96 = 7,918.49/x
  3. Step 3: Cross multiply
    12,392.12x = 17,096.96 × 7,918.49
  4. Step 4: Simplify right side
    12,392.12x = 135,381,981.71
  5. Step 5: Solve for x
    x = 135,381,981.71/12,392.12
  6. Step 6: Final answer
    x = 10,924.85

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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.