Home / 12,172.72-16,800.80-6,867.68

Finding the Fourth Proportional to 12,172.72, 16,800.80 and 6,867.68

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Solution

The fourth proportional to 12,172.72, 16,800.80 and 6,867.68 is: 9,478.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.72 : 16,800.80 = 6,867.68 : x
  2. Step 2: Convert to fraction form
    12,172.72/16,800.80 = 6,867.68/x
  3. Step 3: Cross multiply
    12,172.72x = 16,800.80 × 6,867.68
  4. Step 4: Simplify right side
    12,172.72x = 115,382,518.14
  5. Step 5: Solve for x
    x = 115,382,518.14/12,172.72
  6. Step 6: Final answer
    x = 9,478.78

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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.