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Finding the Fourth Proportional to 12,634.80, 18,973.80 and 8,271.60

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Solution

The fourth proportional to 12,634.80, 18,973.80 and 8,271.60 is: 12,421.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,634.80 : 18,973.80 = 8,271.60 : x
  2. Step 2: Convert to fraction form
    12,634.80/18,973.80 = 8,271.60/x
  3. Step 3: Cross multiply
    12,634.80x = 18,973.80 × 8,271.60
  4. Step 4: Simplify right side
    12,634.80x = 156,943,684.08
  5. Step 5: Solve for x
    x = 156,943,684.08/12,634.80
  6. Step 6: Final answer
    x = 12,421.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.