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Finding the Fourth Proportional to 12,636.70, 17,439.84 and 7,259.89

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Solution

The fourth proportional to 12,636.70, 17,439.84 and 7,259.89 is: 10,019.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.70 : 17,439.84 = 7,259.89 : x
  2. Step 2: Convert to fraction form
    12,636.70/17,439.84 = 7,259.89/x
  3. Step 3: Cross multiply
    12,636.70x = 17,439.84 × 7,259.89
  4. Step 4: Simplify right side
    12,636.70x = 126,611,320.02
  5. Step 5: Solve for x
    x = 126,611,320.02/12,636.70
  6. Step 6: Final answer
    x = 10,019.33

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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.