Home / 12,187.08-16,821.30-6,885

Finding the Fourth Proportional to 12,187.08, 16,821.30 and 6,885

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Solution

The fourth proportional to 12,187.08, 16,821.30 and 6,885 is: 9,503.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.08 : 16,821.30 = 6,885 : x
  2. Step 2: Convert to fraction form
    12,187.08/16,821.30 = 6,885/x
  3. Step 3: Cross multiply
    12,187.08x = 16,821.30 × 6,885
  4. Step 4: Simplify right side
    12,187.08x = 115,814,650.50
  5. Step 5: Solve for x
    x = 115,814,650.50/12,187.08
  6. Step 6: Final answer
    x = 9,503.07

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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.