Home / 11,921.77-16,451.67-6,885.60

Finding the Fourth Proportional to 11,921.77, 16,451.67 and 6,885.60

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Solution

The fourth proportional to 11,921.77, 16,451.67 and 6,885.60 is: 9,501.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.77 : 16,451.67 = 6,885.60 : x
  2. Step 2: Convert to fraction form
    11,921.77/16,451.67 = 6,885.60/x
  3. Step 3: Cross multiply
    11,921.77x = 16,451.67 × 6,885.60
  4. Step 4: Simplify right side
    11,921.77x = 113,279,618.95
  5. Step 5: Solve for x
    x = 113,279,618.95/11,921.77
  6. Step 6: Final answer
    x = 9,501.91

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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.