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Finding the Fourth Proportional to 12,712.60, 17,550.37 and 8,685.48

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Solution

The fourth proportional to 12,712.60, 17,550.37 and 8,685.48 is: 11,990.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712.60 : 17,550.37 = 8,685.48 : x
  2. Step 2: Convert to fraction form
    12,712.60/17,550.37 = 8,685.48/x
  3. Step 3: Cross multiply
    12,712.60x = 17,550.37 × 8,685.48
  4. Step 4: Simplify right side
    12,712.60x = 152,433,431.50
  5. Step 5: Solve for x
    x = 152,433,431.50/12,712.60
  6. Step 6: Final answer
    x = 11,990.74

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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.