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Finding the Fourth Proportional to 12,686.58, 17,505.59 and 11,276.37

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Solution

The fourth proportional to 12,686.58, 17,505.59 and 11,276.37 is: 15,559.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.58 : 17,505.59 = 11,276.37 : x
  2. Step 2: Convert to fraction form
    12,686.58/17,505.59 = 11,276.37/x
  3. Step 3: Cross multiply
    12,686.58x = 17,505.59 × 11,276.37
  4. Step 4: Simplify right side
    12,686.58x = 197,399,453.53
  5. Step 5: Solve for x
    x = 197,399,453.53/12,686.58
  6. Step 6: Final answer
    x = 15,559.71

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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.