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Finding the Fourth Proportional to 12,385.80, 17,100.18 and 8,860.68

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Solution

The fourth proportional to 12,385.80, 17,100.18 and 8,860.68 is: 12,233.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.80 : 17,100.18 = 8,860.68 : x
  2. Step 2: Convert to fraction form
    12,385.80/17,100.18 = 8,860.68/x
  3. Step 3: Cross multiply
    12,385.80x = 17,100.18 × 8,860.68
  4. Step 4: Simplify right side
    12,385.80x = 151,519,222.92
  5. Step 5: Solve for x
    x = 151,519,222.92/12,385.80
  6. Step 6: Final answer
    x = 12,233.30

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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.