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Finding the Fourth Proportional to 12,801.58, 17,674.23 and 9,811.78

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Solution

The fourth proportional to 12,801.58, 17,674.23 and 9,811.78 is: 13,546.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,801.58 : 17,674.23 = 9,811.78 : x
  2. Step 2: Convert to fraction form
    12,801.58/17,674.23 = 9,811.78/x
  3. Step 3: Cross multiply
    12,801.58x = 17,674.23 × 9,811.78
  4. Step 4: Simplify right side
    12,801.58x = 173,415,656.43
  5. Step 5: Solve for x
    x = 173,415,656.43/12,801.58
  6. Step 6: Final answer
    x = 13,546.43

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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.