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Finding the Fourth Proportional to 12,855.89, 17,740.89 and 7,266.89

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Solution

The fourth proportional to 12,855.89, 17,740.89 and 7,266.89 is: 10,028.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.89 : 17,740.89 = 7,266.89 : x
  2. Step 2: Convert to fraction form
    12,855.89/17,740.89 = 7,266.89/x
  3. Step 3: Cross multiply
    12,855.89x = 17,740.89 × 7,266.89
  4. Step 4: Simplify right side
    12,855.89x = 128,921,015.98
  5. Step 5: Solve for x
    x = 128,921,015.98/12,855.89
  6. Step 6: Final answer
    x = 10,028.17

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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.