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Finding the Fourth Proportional to 12,706.94, 17,535.58 and 7,738.94

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Solution

The fourth proportional to 12,706.94, 17,535.58 and 7,738.94 is: 10,679.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,706.94 : 17,535.58 = 7,738.94 : x
  2. Step 2: Convert to fraction form
    12,706.94/17,535.58 = 7,738.94/x
  3. Step 3: Cross multiply
    12,706.94x = 17,535.58 × 7,738.94
  4. Step 4: Simplify right side
    12,706.94x = 135,706,801.49
  5. Step 5: Solve for x
    x = 135,706,801.49/12,706.94
  6. Step 6: Final answer
    x = 10,679.74

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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.