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Finding the Fourth Proportional to 12,885.99, 17,781.83 and 7,579.79

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Solution

The fourth proportional to 12,885.99, 17,781.83 and 7,579.79 is: 10,459.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.99 : 17,781.83 = 7,579.79 : x
  2. Step 2: Convert to fraction form
    12,885.99/17,781.83 = 7,579.79/x
  3. Step 3: Cross multiply
    12,885.99x = 17,781.83 × 7,579.79
  4. Step 4: Simplify right side
    12,885.99x = 134,782,467.26
  5. Step 5: Solve for x
    x = 134,782,467.26/12,885.99
  6. Step 6: Final answer
    x = 10,459.61

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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.