Home / 12,208.20-16,847.40-7,172.64

Finding the Fourth Proportional to 12,208.20, 16,847.40 and 7,172.64

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Solution

The fourth proportional to 12,208.20, 16,847.40 and 7,172.64 is: 9,898.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,208.20 : 16,847.40 = 7,172.64 : x
  2. Step 2: Convert to fraction form
    12,208.20/16,847.40 = 7,172.64/x
  3. Step 3: Cross multiply
    12,208.20x = 16,847.40 × 7,172.64
  4. Step 4: Simplify right side
    12,208.20x = 120,840,335.14
  5. Step 5: Solve for x
    x = 120,840,335.14/12,208.20
  6. Step 6: Final answer
    x = 9,898.29

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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.