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Finding the Fourth Proportional to 12,405.85, 17,070.05 and 12,110.60

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Solution

The fourth proportional to 12,405.85, 17,070.05 and 12,110.60 is: 16,663.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.85 : 17,070.05 = 12,110.60 : x
  2. Step 2: Convert to fraction form
    12,405.85/17,070.05 = 12,110.60/x
  3. Step 3: Cross multiply
    12,405.85x = 17,070.05 × 12,110.60
  4. Step 4: Simplify right side
    12,405.85x = 206,728,486.98
  5. Step 5: Solve for x
    x = 206,728,486.98/12,405.85
  6. Step 6: Final answer
    x = 16,663.80

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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.