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Finding the Fourth Proportional to 12,479.94, 18,707.49 and 6,935.76

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Solution

The fourth proportional to 12,479.94, 18,707.49 and 6,935.76 is: 10,396.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.94 : 18,707.49 = 6,935.76 : x
  2. Step 2: Convert to fraction form
    12,479.94/18,707.49 = 6,935.76/x
  3. Step 3: Cross multiply
    12,479.94x = 18,707.49 × 6,935.76
  4. Step 4: Simplify right side
    12,479.94x = 129,750,660.84
  5. Step 5: Solve for x
    x = 129,750,660.84/12,479.94
  6. Step 6: Final answer
    x = 10,396.74

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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.