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Finding the Fourth Proportional to 12,911.00, 17,820.97 and 8,435.48

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Solution

The fourth proportional to 12,911.00, 17,820.97 and 8,435.48 is: 11,643.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.00 : 17,820.97 = 8,435.48 : x
  2. Step 2: Convert to fraction form
    12,911.00/17,820.97 = 8,435.48/x
  3. Step 3: Cross multiply
    12,911.00x = 17,820.97 × 8,435.48
  4. Step 4: Simplify right side
    12,911.00x = 150,328,459.48
  5. Step 5: Solve for x
    x = 150,328,459.48/12,911.00
  6. Step 6: Final answer
    x = 11,643.44

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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.