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Finding the Fourth Proportional to 12,685.68, 18,935.28 and 11,794.32

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Solution

The fourth proportional to 12,685.68, 18,935.28 and 11,794.32 is: 17,604.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.68 : 18,935.28 = 11,794.32 : x
  2. Step 2: Convert to fraction form
    12,685.68/18,935.28 = 11,794.32/x
  3. Step 3: Cross multiply
    12,685.68x = 18,935.28 × 11,794.32
  4. Step 4: Simplify right side
    12,685.68x = 223,328,751.61
  5. Step 5: Solve for x
    x = 223,328,751.61/12,685.68
  6. Step 6: Final answer
    x = 17,604.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.